Infectious

Whatever change happened to you can also be spread to the people you have physical or sexual contact with. Often happens through transmission of semen (specifically, something along the lines of “my cum makes you grow”) or sweat, but can involve methods as innocuous as kissing, or smelling the subject’s potent musk.

  Child of:  Partner-Related Changes. Related tags:  Absorption;Body Swap;Hyper Pheromones;Infectious;Merging;Shared Body.

  Tag Group:  Transformation.

A 7

Ad man by FanTCMan Powerful ad exec Tucker needs the help of one of his reps, an amateur bodybuilder named Larry, to break into the sports and fitness market. Larry takes the initiative and offers to help a potential client test their new supplement, and the results aren't what Tucker or Larry expect. Added Dec 2003 84k views 5.0 stars (53 votes) 8,642 words •Cock Growth•Huge Cock•Hyper Cock•Hyper Cum•Straight to Gay•Hyper Muscle•Muscle Growth•Muscle/Strength•Getting Hairy•Nonconsensual change•Infectious •M/M

An airplane parasite by SomeMuscleGuy After bumping into the wrong person at the airport, Michael is infected with a parasite that was on its way to be destroyed. This parasite only has one goal in mind: Growth. Massive Growth. Added Oct 2022 22k views 4.7 stars (27 votes) 4,977 words •Cock Growth•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Hyper Cum•Multi-abs•Hyper Muscle•Hyper Strength•Immobility•Muscle Growth•Butt Growth•Foot Growth•Transformation•Voice Deepening•Getting Taller•Giants•Size Increase•Destruction/Violence•Nonconsensual change•Infectious•Aliens•Symbiotes •M

All good things by Anon Amon After the discovery of an ancient artifact, life is changed forever for a group of college students who have bigger things to worry about than getting ready to start classes. 111 parts Added Feb 2017 212k views 4.6 stars (144 votes) 132k words (#9) •Cock Growth•Cockfucking•Huge Balls•Huge Cock•Hyper Cock•Cum inflation•Hyper Cum•Nipple Emissions•Straight to Gay•Hyper Muscle•Hyper Strength•Immobility•Muscle Growth•Muscle/Strength•Giants•Size Increase•Incest•Brothers•Twins•Infectious•Pagan gods•Complete •M/M•M/M/M

All your wildest dreams by FloralSpaded When Walker has his hot friend Joe over for the night, things get out of hand and all of Walker’s wildest dreams come true. 2 parts Added Jun 2018 17k views 3.1 stars (19 votes) 1,496 words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Infectious

And then he came by Teen Hulk David's dream is interrupted … but only until his next visit to the gym. 2 parts Added May 2002 44k views 4.4 stars (9 votes) 7,372 words •Cock Growth•Huge Cock•Self-suck•Hyper Cum•Muscle Growth•Muscle/Strength•First Time/Virgin•Infectious •M/M

Angelo and Adrian by WordShop Genius Angelo and sweet Adrian are both scarred by their pasts. Angelo has to accept change in his life, and accidentally, without intending it, Adrian is forced to accept a new life for which he is not at all prepared. 9 parts Added Oct 2017 25k views 4.5 stars (8 votes) 43k words (#83) •Cock Growth•Muscle Growth•Muscle/Strength•Gradual Change•Hyper Pheromones•Infectious •M/M

At the cafeteria by BRK Jordan meets up with his friends at the cafeteria very late one night before midterms. They end up making a game of passing around Ethan’s ancient-recipe birthday liqueur and telling strange rumors about each other, with some unintended consequences. 3 parts Added Jun 2015 30k views 4.7 stars (43 votes) 8,362 words •Cock Growth•Huge Cock•Multicock•Muscle Growth•Muscle/Strength•Getting Handsomer•Retcon•Suggestion•Infectious•Immortality •M/M•M/M/M

B 8

Bear’s den by Pfefferooney David is a small university student and he wants nothing more than to be, and be with, an enormous man. On a fateful day, he stumbles upon someone who can make his dream come true. 3 parts Added Mar 2019 35k views 4.8 stars (14 votes) 9,022 words •Cock Growth•Cockfucking•Huge Balls•Huge Cock•Hyper Cock•Nipple Emissions•Muscle Growth•Muscle/Strength•Belly Growth•Size Increase•Getting Hairy•Infectious •M/M

Bending the straight boys by iciss At first all those hot straight guys seemed like real jerks. And then they started getting hunkier, and hornier, and a lot more aware of each other. 2 parts Added Jan 2008 71k views 4.7 stars (39 votes) 11k words •Cock Growth•Huge Cock•Public Orgasm•Straight to Gay•Muscle Growth•Muscle/Strength•Getting Handsomer•First Time/Virgin•Incest•Brothers•Twins•Nonconsensual change•Infectious •M/M•M/M/M

The best instructions are those that are clearly stated by Ziel Marty talks his super smart friend into whipping him up a special potion that will help with his little problem. Added Jun 2016 21k views 5.0 stars (11 votes) 5,194 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Infectious •M/M

Bigger issues: Ultimate growth by muscl4life 6 parts Added Nov 2013 44k views 4.4 stars (7 votes) 32k words •Cock Growth•Huge Cock•Hyper Cock•Muscle Growth•Muscle/Strength•Muscle Worship•Increased Libido•Size Increase•Infectious

The book of desires by SomeMuscleGuy After stealing a corrupted book at the gym, Michael is left growing uncontrollably by a Symbiotic Demon that only wants to swell its victims with the most size possible. But even the demon underestimates just how gigantic Michael wants to become. Added Dec 2022 16k views 4.9 stars (8 votes) 7,676 words •Cock Growth•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Hyper Cum•Public Orgasm•Multi-abs•Addiction•Hyper Muscle•Hyper Strength•Immobility•Muscle Growth•Muscle Worship•Public Nudity•Butt Growth•Foot Growth•Transformation•Voice Deepening•Getting Taller•Giants•Size Increase•Destruction/Violence•Nonconsensual change•Infectious•Aliens•Symbiotes•Complete•Stories with Images •M

Boosted by West Phil has a clumsy moment, and suddenly the school’s Augmented Reality room ends up being so much more. 3 parts Added Aug 2021 16k views 4.6 stars (21 votes) 5,429 words •Cock Growth•Huge Cock•Hyper Cock•Hyper Cum•Multi-abs•Hyper Muscle•Muscle Growth•Muscle/Strength•Getting Handsomer•Getting Taller•Plausible Size Difference•Size Increase•Tongue Growth•A.I.-Controlled Change•App•Incest•Brothers•Infectious•Complete

The breakthrough by Gigantic Mr.B One lapse in concentration sets off an unstoppable chain of events for an 18-year-old lab intern, Ben. 5 parts Added Apr 2022 28k views 4.8 stars (38 votes) 18k words •Cock Growth•Huge Balls•Huge Cock•Hyper Cum•Hyper Muscle•Hyper Strength•Muscle Growth•Butt Growth•Gradual Change•Getting Taller•Size Increase•Infectious •M/M

Bull’s strength by muscl4life On a quiet farm far from anywhere, an orphan named Joshua grows up so huge and strong that he’s bullied for being a freak. His aunt and uncle raise him with love and teach him to accept who he is, but Joshua yearns to be among men who don’t just accept his giant body, but love and admire his amazing size and power. 28 parts Added Jul 2018 86k views 4.8 stars (43 votes) 88k words (#28) •Always Hard•Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Multi-abs•Multicock•Muscle Growth•Muscle/Strength•Muscle Worship•Transformation•Getting Taller•Plausible Size Difference•Size Increase•Age Difference•Bestiality•Incest•Father/Son•Destruction/Violence•Infectious•Flying •M/M•M/M/M•M/M/M/...

C 12

Casey’s mancock by BRK Undersized college student Casey develops a sudden need for a cock just big enough for people to know it’s there. And between his own skills and his unwitting roommate’s, he knows just how to make it happen. 13 parts Added Jul 2022 40k views 4.9 stars (74 votes) 48k words (#69) •Always Hard•Cock Growth•Huge Cock•Self-suck•Hyper Cum•Public Orgasm•Pec Fucking•Muscle Growth•Always Shirtless•Public Nudity•Increased Libido•Getting Handsomer•Gradual Change•Getting Taller•Forced Growth•Plausible Size Difference•Size Increase•App•Nonconsensual change•Hyper Pheromones•Infectious•Hypnosis•Mind Control •M/M•M/M/M•M/M/M/...

The Change continues by Richard Jasper The Change is unstoppable, spreading rapidly through the gay male population, while those who first experienced it revel in their increasingly wild transformation. 6 parts Added Apr 2020 12k views 4.5 stars (4 votes) 6,405 words •Cock Growth•Huge Cock•Muscle Growth•Getting Taller•Size Increase•Nonconsensual change•Infectious

Changes in Bigby Heights by NBCK99 Alex Stevens has always been shy, being the only boytaur in Bigby Heights, but Jesse helps bring him out of his shell. But after their first encounter, reality seems to shift. 3 parts Added Jun 2010 25k views 4.7 stars (22 votes) 5,173 words •Always Hard•Cock Growth•Huge Cock•Self-suck•Multi-abs•Multicock•Boytaur•Four Legs•Multiarm•Multilimb•Muscle Growth•Muscle/Strength•Getting Taller•Retcon•Infectious •M/M•M/M/M

Chat transcript: More than plenty by BRK Two guys chatting about extras end up giving each other the works. Added Nov 2014 8,104 views 5.0 stars (7 votes) 2,780 words •Multicock•Multilimb•Replication•Size Increase•Selfcest•Infectious•All Dialog •M/M

A Christmas wish by Buck Reams Writing out your fantasies can have practical consequences, if you do it on a scrap of paper you forgot came from a magical tome. Added Dec 2019 19k views 4.8 stars (22 votes) 1,975 words •Cock Growth•Huge Balls•Huge Cock•Nipcocks•Hyper Cum•Nipple Emissions•Muscle Growth•Muscle/Strength•Transformation•Size Increase•Getting Hairy•Nonconsensual change•Infectious•Christmas •M/M

Coach Barker by Argenti Coach Travis Barker has a special gift, and when he shares this gift with Adam, change begins to unfold around them. 9 parts Added May 2019 40k views 4.9 stars (33 votes) 19k words •Cock Growth•Huge Cock•Hyper Cock•Hyper Cum•Straight to Gay•Muscle Growth•Muscle/Strength•Getting Taller•Giants•Plausible Size Difference•Size Increase•Infectious

Coach’s big surprise (Revised) by SomeMuscleGuy and MuscleMike Josh is struggling to keep up with the rest of his college wrestling team, and he’s afraid he will not make the cut. Luckily, a former student of his teacher, Coach Smith, is sent a package that’ll make them both become the men they’ve always dreamed of becoming—and more. 5 parts Added May 2023 47k views 4.8 stars (29 votes) 18k words •Always Hard•Cock Growth•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Self-suck•Public Orgasm•Addiction•Hyper Muscle•Hyper Strength•Immobility•Muscle Growth•Muscle/Strength•Muscle Worship•Public Nudity•Increased Libido•Transformation•Voice Deepening•Getting Taller•Giants•Size Increase•Getting Hairy•Destruction/Violence•Infectious•Complete •M/M•M/M/M

Containment breach by SomeMuscleGuy After Kalos experiences a suit malfunction while working with a Radioactive Material at work, he is left growing at a quickening rate to sizes that nobody ever thought was possible, and its contaminated effects are spreading too fast to be stopped. Added Mar 2023 13k views 4.7 stars (17 votes) 11k words •Always Hard•Cock Growth•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Self-suck•Cum Milking•Always Cumming•Hyper Cum•Nipple Emissions•Public Orgasm•Extra digits•Multi-abs•Multiarm•Addiction•Hyper Muscle•Hyper Strength•Immobility•Muscle Growth•Muscle Gut•Muscle Worship•Public Nudity•Butt Growth•Belly Growth•Increased Libido•Transformation•Voice Deepening•Getting Taller•Giants•Forced Growth•Size Increase•Getting Hairy•Nonconsensual change•Rubber/Latex•Infectious•Complete •M

Contamination by RdyRoger After his dick came in contact with an experimental substance, high schooler Vincent starts slowly getting bigger… first in his crotch and then other places, too. Thomas, a tall, handsome jock, likes teasing him about it at every opportunity. Added Jul 2019 25k views 4.6 stars (19 votes) 6,135 words •Cock Growth•Huge Balls•Huge Cock•Muscle Growth•Muscle/Strength•Gradual Change•Getting Taller•Size Increase•Getting Hairy•Infectious •t/t

Crotchmania by Alex Anders A lucky porn star gets to partake of the newest fad. Added Aug 2021 4,332 views 4.5 stars (2 votes) 1,672 words •Crotchhead•Transformation•Mouthcock•Infectious

Curse room by BRK As the landlord’s son, Joey gets to deal with abandoned apartments and whatever might be in them. Usually it’s just junk; but the guy that skipped on unit 12E was deeply weird, and the way he’d looked at Joey before was more than a little scary. Added Apr 2022 6,318 views 4.4 stars (9 votes) 2,828 words •Cock Growth•Huge Balls•Huge Cock•Multi-abs•Multiarm•Multilimb•Muscle Growth•Getting Taller•Plausible Size Difference•Infectious •M/M

Cursed to swell with cum by BigManBigBelly Max, like so many others, is powerless to resist Damien’s charm and blessed to be stretched open by his enormous meat. But his seed proves more potent than Max could have imagined… And possibly more than he can handle. Added Mar 2022 15k views 4.3 stars (9 votes) 2,974 words •Cum inflation•Cum Milking•Hyper Cum•Nipple Emissions•Immobility•Belly Growth•Size Increase•Getting Fatter•Infectious•Supernatural •M/M

D 2

Damian and the three muscleteens by hyperboi 5 parts Added Dec 2012 57k views 4.3 stars (27 votes) 8,170 words •Cock Growth•Huge Cock•Hyper Cock•Straight to Gay•Muscle Growth•Muscle/Strength•Age Difference•Incest•Brothers•Father/Son•Twins•Infectious

Don’t cum by LordTronimator A world doomed by those who find themselves unable to stop cumming once they start, recounted by an innocent victim. Added Sep 2020 10k views 4.0 stars (5 votes) 1,471 words •Hyper Cum•Nonconsensual change•Infectious•Horror

E 2

Enlargement by Boston Guy A medical engineer develops nanotechnology that could cure the world of multiple diseases. But his true motivation is not so noble. 5 parts Added May 2013 58k views 4.6 stars (29 votes) 15k words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Straight to Gay•Muscle Growth•Muscle/Strength•Increased Libido•Gradual Change•Transformation•Size Increase•Nanotech•Nonconsensual change•Infectious•Hyper Anus •M/M•M/M/M•M/M/M/...

The expedition by BRK An archaeologist and his research assistant, joined at the last minute by a jock desperate to boost his GPA, embark on a preliminary exploration of a mysterious Aegean island. 16 parts Added Jul 2021 18k views 4.9 stars (16 votes) 37k words •Always Hard•Cock Growth•Huge Cock•Multicock•Multihead•Boytaur•Four Legs•Lots of Legs•Multiarm•Multileg•Multilimb•Three Legs•Multitongue•Replication•Stacking•Hyper Strength•Muscle Growth•Muscle/Strength•Always Shirtless•Increased Libido•Getting Taller•Giants•Plausible Size Difference•Size Decrease•Size Increase•Tongue Growth•Age Difference•Selfcest•Infectious•Merging•Shared Body•Centaurs•Pagan gods •M/M•M/M/M

F 2

Field agent by BRK Special agents Adkins and Barber interview a rancher in relation to their current case. There’s something odd about the handsome Latino, though—starting with the fact that he won’t get down off his horse. 2 parts Added Apr 2020 11k views 4.9 stars (21 votes) 5,236 words •Cock Growth•Huge Cock•Hyper Cock•Hyper Cum•Multicock•Boytaur•Four Legs•Multiarm•Multileg•Multilimb•Replication•Muscle Growth•Public Nudity•Size Increase•Incest•Twins•Selfcest•Infectious•Centaurs •M/M•M/M/M

Frat crisis by BRK Jacob returns to his frat after a week away to find it stinking of sex and full of guys a lot bigger than he remembered them being. Added Jun 2022 12k views 4.8 stars (21 votes) 3,917 words •Always Hard•Cock Growth•Huge Balls•Huge Cock•Hyper Cum•Straight to Gay•Pec Fucking•Muscle Growth•Muscle/Strength•Increased Libido•Getting Handsomer•Gradual Change•Voice Deepening•Getting Hairy•Nonconsensual change•Infectious•Complete •M/M•M/M/M•M/M/M/...

G 6

Geno-type by Ziel While on a camping trip, Tyler makes a half-assed wish on a shooting star. Not only does he get his wish, but it begins to affect those around him as well. Maybe he should have been more specific? An ongoing saga of hyper growth and the weird social situations it results in. 34 parts Added Dec 2012 102k views 4.3 stars (26 votes) 144k words (#7) •Cock Growth•Cockfucking•Huge Cock•Hyper Cock•Infectious •t/t•t/t/t

The good freak by Also Known As Kevin Peters is a cheerful, very fit young man who happens to be getting bigger and hotter in every way, much to the bemusement (and secret arousal) of his doctor. Soon the guys around him are growing too, and Dr. Donaldson discovers even he’s not immune... 33 parts Added Nov 2002 49k views 4.9 stars (24 votes) 34k words •Always Hard•Cock Growth•Huge Balls•Huge Cock•Hyper Cum•Muscle Growth•Muscle/Strength•Gradual Change•Getting Taller•Size Increase•Infectious•April Fool’s Day •M/M•M/M/M•t/t•t/t/t•M/t

Growing boys at UMich by iciss Those football jocks in the UMIch gym are about to get a whole lot hotter. 4 parts Added Jan 2007 41k views 4.7 stars (21 votes) 7,144 words •Cock Growth•Huge Cock•Straight to Gay•Muscle Growth•Muscle/Strength•Getting Handsomer•Infectious •M/M

Growing pains by Anonymous 4 parts Added Jul 2002 23k views 4.4 stars (5 votes) 4,674 words •Cock Growth•Muscle Growth•Muscle/Strength•Infectious

Gym maniac over his head by MuscularEmperor Alexander discovers that the sweat and sperm of bodybuilders affects his own body, which begins a dangerous and destructive obsession. Added Jan 2020 15k views 3.6 stars (19 votes) 3,322 words •Cock Growth•Huge Cock•Hyper Cock•Hyper Muscle•Muscle Growth•Muscle/Strength•Size Increase•Destruction/Violence•Nonconsensual change•Nonconsensual sex•Infectious

Gym parasite by Aphon When a failed experimental piece of parasite goop finds itself in a gym, it must spread itself quickly or die. Its means of transmission has some huge side effects, whether you like it or not… Added Dec 2019 21k views 4.6 stars (25 votes) 1,711 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Straight to Gay•Nonconsensual change•Infectious •M/M

H 5

Huge changes: Book two by RdyRoger Jason and Todd decide to help Mason, not suspecting that Mason will get an extra helping of wishes, or that Mason’s fantasies of love and growth will start affecting more than just his partners. 2 parts Added Dec 2017 19k views 4.9 stars (8 votes) 9,859 words •Cock Growth•Huge Balls•Huge Cock•Muscle Growth•Muscle/Strength•Plausible Size Difference•Size Increase•Getting Hairy•Nonconsensual change•Infectious

Hulk hunter by JayPat Hunter has dedicated his life to tracking and neutralizing the hundreds of huge-growing hulks that have been terrorizing small towns for twenty years now, and he’s damn good at what he does. But when he gets to his latest sighting, he finds things aren’t going the way they usually do. 2 parts Added Sep 2018 20k views 4.6 stars (16 votes) 11k words •Cock Growth•Huge Cock•Hyper Cock•Multi-abs•Muscle Growth•Muscle/Strength•Transformation•Giants•Size Increase•Destruction/Violence•Nonconsensual change•Infectious •M/M

The hulk pill by JayPat The only thing weirder than your buddy Boz offering you a “hulk pill” would be for it to actually work. 5 parts Added Oct 2012 94k views 4.7 stars (29 votes) 29k words •Cock Growth•Huge Cock•Hyper Muscle•Hyper Strength•Muscle Growth•Muscle/Strength•Size Increase•Nanotech•Destruction/Violence•Infectious•Complete •t/t

The hulk pill: Contagion by Azerreza Awakened by his brother Mike, David got the surprise of his life when he discovered that his big brother was now... really big: 8 feet tall and probably several tons of muscle. Unfortunately he did not know more about what had happened to him, so he met his friends at the mall as planned. But during the day, he noticed that his clothes seemed to be getting tighter and tighter, including the new ones he had just bought that morning... David was unknowingly one of the first to be infected with what would quickly become a pandemic. 4 parts Added Jul 2022 19k views 4.8 stars (10 votes) 16k words •Cock Growth•Huge Balls•Huge Cock•Hyper Cum•Muscle Growth•Increased Libido•Transformation•Voice Deepening•Getting Taller•Plausible Size Difference•Size Increase•Nanotech•Destruction/Violence•Nonconsensual change•Infectious •M

The hulk pill: Contagion 2 by Azerreza Having just been beaten up by his usual bully, Matt thought that this day couldn’t have started any worse. Especially since he had to meet his buddies, David and Ben at the mall. But he had absolutely no idea that this day would change everything and that, on the contrary, it would be the best day of his life... 6 parts Added Jan 2023 8,332 views 4.8 stars (6 votes) 23k words •Hyper Cum•Hyper Muscle•Hyper Strength•Muscle Growth•Muscle/Strength•Increased Libido•Voice Deepening•Size Increase•Nanotech•Destruction/Violence•Infectious •t/t

I 6

In the sack by Neltharion5 Brian finds a magical backpack that uses magazines as fuel to transform him. Soon, he realizes that his enhancements are sexually contagious, making his sex partners hotter. What else will he discover about the magic sack? Added Mar 2017 13k views 4.5 stars (8 votes) 3,526 words •Huge Cock•Muscle Growth•Muscle/Strength•Infectious

Incubus by CentaurQuinn Ken discovers his friend with benefits is more than he seems, and might be a solution to a problem at work. Added Oct 2020 12k views 4.8 stars (30 votes) 2,534 words •Cock Growth•Wings•Hyper Muscle•Muscle Growth•Transformation•Getting Taller•Inflation•Infectious•Incubus/Succubus•Supernatural•Immortality•Shapeshifting •M/M

Incubus garage by Quick Master An incubus of the lower realms aims to corrupt all of the men working at a greasy local garage into incubi. 3 parts Added Dec 2021 12k views 5.0 stars (4 votes) 15k words •Cock Growth•Huge Balls•Huge Cock•Nipple Emissions•Multicock•Straight to Gay•Muscle Breast•Muscle Growth•Muscle/Strength•Increased Libido•Transformation•Getting Taller•Plausible Size Difference•Size Increase•Human to Animal/Anthro•Tongue Growth•Hyper Pheromones•Infectious•Demons•Incubus/Succubus•Supernatural •M/M•M/M/M•M/M/M/...

Induced transformation: a brief history by BRK A father explains to his son that back in his day, they didn’t have any of these fancy-schmancy apps with built-in retcon. Back then, if you changed someone, they changed, and everyone had to just suck it up and deal with it. Added Jun 2020 12k views 4.9 stars (17 votes) 2,248 words •Cock Growth•Huge Cock•Hyper Cock•Hyper Cum•Replication•Muscle Growth•Age Regression•App•Retcon•Age Difference•Incest•Brothers•Father/Son•Selfcest•Nonconsensual change•Infectious•All Dialog•Complete •M/M•M/M/M/...

Interview with the King of Dust by Betonhaus Jason Ramstaff, also known as the King of Dust, explains the strange growth effects of the extraterrestrial substance known as Dust—complete with a demonstration of exactly how he passes its effects on to others. Added Feb 2021 6,288 views 4.7 stars (3 votes) 3,267 words •Cock Growth•Huge Cock•Hyper Cock•Hyper Cum•Muscle Growth•Muscle/Strength•Plausible Size Difference•Size Increase•Nanotech•Dom/Sub•Infectious

It’s magic by TylerGermany 2 parts Added Apr 2014 12k views 2,094 words •Transformation•Infectious

J 3

Jake: hand-drawn giant by spacevlad Drawing massive, muscle-hunk football stars seems like a safe enough hobby—but what if your drawing takes on a life of its own? 7 parts Added Sep 2009 32k views 4.8 stars (8 votes) 12k words •Huge Cock•Muscle Gut•Muscle/Strength•Size Increase•Infectious •M/M

Jizzer by Ziel Ethan drags his roommate Walt off to the woods on the outskirts of town to search for their mutual friend. Added Oct 2021 11k views 4.3 stars (9 votes) 2,426 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Hyper Muscle•Immobility•Muscle Growth•Muscle/Strength•Giants•Size Increase•Infectious•Horror •M/M

The journal by Braun1 An ordinary college guy finds himself changing after a steamy encounter with a hunk named Brad, and decides to start documenting everything that’s happening to him. 11 parts Added Feb 2003 28k views 4.8 stars (14 votes) 30k words •Cock Growth•Huge Balls•Huge Cock•Muscle Growth•Muscle/Strength•Size Increase•Getting Hairy•Infectious •M/M

M 7

Male scent by Frank Easky Apprentice magician Sean’s potion exceeds his expectations, causing his personal musk to spread muscle growth to those who smell it. 2 parts Added Jul 2002 60k views 4.1 stars (16 votes) 14k words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Hyper Muscle•Muscle Growth•Muscle/Strength•Man Scent•Getting Taller•Giants•Size Increase•Age Regression•Getting Hairy•Incest•Brothers•Twins•Hyper Pheromones•Infectious

Max’s wish by Bulge101 Scrawny Max uses his wish-power to make himself worthy of the extremely hot bully he has a crush on, but his friend Bobby deserves his help, too, and soon lots of changes start happening at school and at home. 11 parts Added Aug 2011 304k views 4.6 stars (80 votes) 25k words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Size Increase•Infectious •M/M•M/M/M

Medicine show by Fafhrd and Longbow9 Underendowed College student Terry comes in contact with a mysterious “extension cream” that turns out to be the real thing. Soon, he and his male and female friends are transforming themselves, and some are unable to stop. 174 parts Added Feb 2012 209k views 4.5 stars (25 votes) 250k words (#2) •Cock Growth•Ball Growth•Huge Cock•Hyper Cock•Self-suck•First Time/Virgin•Bisexual•Hetero Sex•Lycra/Spandex•Infectious •M•M/M•M/F•M/F/F•M/M/F

The minotaur equation by LeatherGryphon After Dale rewrites his DNA to become a hugely muscled, hugely hung minotaur, he discovers he hadn’t thought through his transformation. 7 parts Added Jul 2014 31k views 4.8 stars (25 votes) 16k words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Human to Animal/Anthro•Infectious•Anthro/Furry •M/M

More than expected by LennoxBear Intent on preventing his beefy bod from getting soft, Joe is increasingly obsessed with his gym workouts. Then he meets a kindred spirit who helps him take things to a whole new level. 5 parts Added Jul 2002 95k views 4.3 stars (19 votes) 20k words •Cock Growth•Huge Balls•Huge Cock•Cum Milking•Nipple Emissions•Straight to Gay•Muscle Breast•Muscle Growth•Muscle/Strength•Getting Hairy•First Time/Virgin•Nonconsensual change•Infectious •M/M

Morphogenic steroids by RdyRoger Rod’s dad is working on a new technology that makes small things bigger and big things huge, with incredible implications for food supplies and beyond—only it only lasts for five hours. Rod figures being bigger for five hours… that would be pretty awesome. 4 parts Added Oct 2019 24k views 4.5 stars (13 votes) 15k words •Cock Growth•Huge Balls•Huge Cock•Self-suck•Muscle Growth•Muscle/Strength•Increased Libido•Gradual Change•Getting Taller•Plausible Size Difference•Size Increase•Getting Hairy•Infectious

Moving forward by West When Brandon’s life takes an unexpected turn, his new roommate turns it around once again. Added Feb 2022 4,903 views 4.4 stars (7 votes) 1,334 words •Cock Growth•Huge Cock•Multicock•Straight to Gay•Muscle Growth•Getting Taller•Suggestion•Infectious •M/M

N 3

The new guy by Also Known As A new employee causes pleasant though potentially cum-plicated problems. 8 parts Added Jun 2019 38k views 4.8 stars (44 votes) 39k words (#98) •Always Hard•Cock Growth•Huge Cock•Hyper Cum•Addiction•Muscle Growth•Muscle/Strength•Getting Handsomer•Nonconsensual change•Infectious •M/M•M/M/M

New normal by brazboy Pedro is a Brazilian university student who returned to live with his roommates after one and a half years living with his family during the pandemics, but everything is not the same. His roommates Carlos and Henrique will not tell him what exactly has changed, wanting him to see it with his own two eyes. Added Jun 2021 12k views 4.7 stars (15 votes) 5,662 words •Cock Growth•Cockfucking•Huge Cock•Hyper Cock•Hyper Cum•Nipple Emissions•Muscle Breast•Muscle Growth•Getting Taller•Plausible Size Difference•Size Increase•Infectious•Set during the Pandemic •M/M•M/M/M

Nobody’s perfect by Also Known As A psychologist prepares himself to meet the subject whose response to the enhancement drug was so intense that just to be near him is to risk erotic overload… a man known only as Twenty-Five. 9 parts Added Feb 2022 34k views 4.9 stars (32 votes) 54k words (#61) •Cock Growth•Huge Balls•Huge Cock•Muscle Growth•Increased Libido•Getting Handsomer•Transformation•Voice Deepening•Getting Taller•Plausible Size Difference•Size Increase•Hyper Pheromones•Infectious•Metabods 25 •M/M

O 1

Omega cursed: An alpha touch side story by Caliburn Best friends Ryan and Sam finally get to enjoy a much-anticipated camping trip. However, Sam has being acting odd ever since they crossed paths with that man in the gas station. Maybe the weird tattoo that suddenly appeared on Sam’s buttcheek has something to do with it. Added Jun 2022 11k views 4.7 stars (20 votes) 8,604 words •Cock Growth•Huge Balls•Huge Cock•Addiction•Straight to Gay•Muscle Growth•Muscle/Strength•Man Scent•Increased Libido•Foot Growth•Getting Handsomer•Gradual Change•Voice Deepening•Getting Taller•Size Increase•Getting Hairy•Nonconsensual change•Nonconsensual sex•Hyper Pheromones•Infectious •M/M

P 2

Patient zero by SomeMuscleGuy After exploring a crashed meteorite, Tim and Kyle are left growing uncontrollably. The hornier they get, the larger they grow. But what happens when growth itself makes them horny? 3 parts Added Nov 2022 23k views 4.7 stars (20 votes) 13k words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Always Cumming•Hyper Cum•Public Orgasm•Multi-abs•Addiction•Hyper Muscle•Hyper Strength•Immobility•Muscle Growth•Public Nudity•Butt Growth•Increased Libido•Foot Growth•Transformation•Voice Deepening•Getting Taller•Giants•Plausible Size Difference•Size Increase•Nonconsensual change•Infectious•Complete •M/M

Porn can be healthy by Egi Zack is a healthy, horny young man who, like any other boy, likes to look at porn. Always one for novelty, Zack comes across the perfect website for him and his needs! 2 parts Added May 2017 28k views 4.9 stars (43 votes) 8,693 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Social Media•Infectious •M

Q 1

Quarantined by MuscleNexus Devon is excited to hear his lover is returning from his overseas deployment early, after escaping the outbreak of a strange virus that put the rest of his team in quarantine. Only, Scott doesn’t seem to be quite himself… Added Aug 2018 11k views 4.9 stars (15 votes) 1,870 words •Muscle Growth•Muscle/Strength•Nonconsensual change•Infectious

R 2

The radiation zone by SomeMuscleGuy After going off the beaten path to explore an abandoned military base, Alex is involved in an incident that leaves him contaminated with radioactive material, and he won’t stop growing until he escapes. Added Aug 2022 13k views 4.7 stars (26 votes) 3,606 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Hyper Muscle•Hyper Strength•Immobility•Muscle Growth•Muscle/Strength•Butt Growth•Increased Libido•Foot Growth•Gradual Change•Transformation•Voice Deepening•Getting Taller•Giants•Size Increase•Nonconsensual change•Infectious •M

Resolutions: King factory by BRK The manager of a small, forgotten factory gets a sudden visit from the son of the conglomerate that owns his plant. Not only is he taking over, it seems, but he’s insistent on maximizing profit—even to the point of reviving production on that one sweetener everyone knows is a joke. 2 parts Added Mar 2022 4,794 views 3.6 stars (9 votes) 6,615 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Increased Libido•Infectious•Complete •M/M

S 10

Sam and Bolt by MaxMorphs Sam’s father, Bolt, shares with his size-hungry son the secrets of becoming truly huge. 11 parts Added Sep 2016 79k views 3.9 stars (56 votes) 48k words (#70) •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Nipcocks•Self-suck•Cum inflation•Hyper Cum•Nipple Emissions•Getting Taller•Size Increase•Getting Hairy•Age Difference•Incest•Father/Son•Infectious •M•M/M•M/M/M/...

Santa’s big surprise by Silverfox Dad Jeremy has not only been obsessed with Santa, he's seen him and knows he's real. So when a friend at the gym gives him a muscle-growth supplement meant to give him confidence enough to talk to his beautiful bodybuilder crush Marco, Jeremy decides instead to give Santa a gift of his own. 3 parts Added Jan 2017 18k views 4.9 stars (11 votes) 7,594 words •Muscle Growth•Muscle/Strength•Size Increase•Infectious•Christmas •M/M

Sebastian by TreborNawoc Sebastian’s experiment to transform himself into a multi-hunk worked, and then some! He can’t wait to show off the results to his best friend, Gavin. 4 parts Added Dec 2021 11k views 5.0 stars (177 votes) 8,673 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Self-suck•Extra Mouths•Multi-abs•Multi-balls•Multicock•Boytaur•Four Legs•Lots of Legs•Multiarm•Multileg•Multilimb•Three Legs•Multitorso•Muscle Growth•Increased Libido•Transformation•Getting Taller•Plausible Size Difference•Size Increase•Tongue Growth•First Time/Virgin•Infectious •M/M

Seeing stars by OneLuckyGuy89 12 young, muscular and beautiful men have begun protecting Starlight City. Adam Berry has been having weird dreams lately and has a feeling that his life is about to change. 2 parts Added Mar 2020 11k views 4.3 stars (7 votes) 8,520 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Gay to Straight•Muscle Growth•Muscle Gut•Getting Taller•Size Increase•Getting Hairy•Incest•Twins•Nonconsensual change•Infectious•Merging•Superhero/Supervillain

Side effects 2000 by Braun1 and Z Mike and Jan begin an odyssey of muscle, growth, transformation, sex, and love. 31 parts Added Jul 2002 38k views 4.8 stars (8 votes) 127k words (#11) •Always Hard•Cock Growth•Huge Cock•Hyper Cock•Self-suck•Muscle Growth•Muscle/Strength•Muscle Worship•Size Increase•Infectious

Sk8r dreams by Reaver The Maker is an app that gives you the ability to remake the world around you. That means a better house, a hotter body—and it definitely means turning a few guys in your life into happy, hunky skater bois. 19 parts Added Oct 2003 42k views 4.1 stars (19 votes) 59k words (#48) •Cock Growth•Ball Growth•Huge Cock•Replication•Always Shirtless•Increased Libido•Transformation•Voice Deepening•Age Regression•Race/Ethnicity Change•App•Retcon•Selfcest•Nonconsensual change•Infectious•Mind Control

SNU-5|VU by DracumSum Nathan and Nick have to complete a biochem project on the metahumans caused by the failed SNU-5 nanobot project—only they don’t know any, and the brief random encounter Nathan had at a bus stop the other day won’t help them. Or will it? Added Feb 2022 8,124 views 5.0 stars (5 votes) 6,053 words •Cock Growth•Cut to Uncut•Huge Balls•Huge Cock•Hyper Muscle•Muscle Growth•Increased Libido•Foot Growth•Gradual Change•Transformation•Getting Taller•Giants•Plausible Size Difference•Size Increase•Hairless•Nanotech•Infectious•Set in the Future•Hyper Anus •M/M

The spectacular growing saga by West A collection of brief stories about guys discovering their dream bodies in various ways. 8 parts Added Mar 2022 16k views 4.6 stars (15 votes) 12k words •Cock Growth•Cut to Uncut•Cock Shrinking•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Prehensile Cock•Cum inflation•Hyper Cum•Nipple Emissions•Multi-abs•Multi-balls•Multicock•Multiarm•Multipec•Hyper Muscle•Hyper Strength•Muscle Growth•Muscle Theft•Muscle/Strength•Increased Libido•Getting Taller•Forced Growth•Size Decrease•Size Increase•A.I.-Controlled Change•Retcon•Suggestion•Incest•Brothers•Twins•Triplets•Hyper Pheromones•Infectious•Androids/Cyborgs •M/M•M/M/M

Support line by BRK Customers interacting with the reps at the Metabods Support Line tend not to get the service they’re expecting—though it is always above and beyond. 4 parts Added Feb 2012 29k views 4.8 stars (13 votes) 13k words •Always Hard•Cock Growth•Huge Cock•Hyper Cock•Self-suck•Multicock•Multiarm•Multilimb•Multitorso•Replication•Detachable•App•Selfcest•Infectious•All Dialog •M/M

Sweat it out by Egi Working out is hard enough when you're scrawny and shy. Sometimes you need a partner to help fill you out with some unconventional methods. 2 parts Added Jun 2017 16k views 4.8 stars (12 votes) 8,184 words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Man Scent•Infectious •M/M

T 22

Tales of Atlantis by 10tacles (Updated text, 30 January) Devin washes ashore on the legendary isle of Atlantis, and quickly finds himself in the company of a handsome local. But it would seem the stories of Atlantis’s wonders omitted a number of lurid details... Added Jan 2023 6,184 views 4.8 stars (15 votes) 12k words •Cock Growth•Cock Vore•Cockfucking•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Self-suck•Hyper Cum•Public Orgasm•Multi-balls•Multicock•Always Shirtless•Public Nudity•Male Pregnancy•Giants•Infectious•Goo People•Anthro/Furry•Fantasy Realm•Immortality•Stories with Images •M/M

There’s something about Billy by Ziel Billy seems like perfectly normal, good-looking guy from the waist up. But there’s something going on inside Billy’s weird, super-baggy pants, and Duke and Kevin were determined to find out what it was. Added Feb 2017 16k views 5.0 stars (10 votes) 5,442 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Multi-balls•Multicock•Infectious

Toonifying video call by Demonized When a cartoon dick pic starts turning people into hot animated furries, just imagine what a video call could do! Added Aug 2023 1,950 views 5.0 stars (1 vote) 1,296 words •Cock Growth•Ball Growth•Muscle Growth•Butt Growth•Increased Libido•Transformation•Human to Animal/Anthro•Infectious•Anthro/Furry•Complete •M/M

Transform by Also Known As Containing a secret is a hard thing to do. And the bigger the secret is, the harder it is to keep. No one was finding the truth of this more than those few men in charge at the Institute for Genetic Enhancement where the way has been found to transcend ordinary masculinity. The sequel to Supermen. 35 parts Added Oct 2002 56k views 5.0 stars (9 votes) 132k words (#8) •Cock Growth•Ball Growth•Huge Cock•Prehensile Cock•Multicock•Muscle Growth•Muscle/Strength•Muscle Worship•Voice Deepening•Hyper Pheromones•Infectious•Flying •M/M•M/M/M

Transform: After math by Also Known As Added Jan 2014 10k views 4.8 stars (4 votes) 9,418 words •Huge Cock•Multicock•Muscle Growth•Muscle/Strength•Size Increase•Infectious

Transform: Auto upgrade by Also Known As Added Jan 2014 9,798 views 5.0 stars (5 votes) 10k words •Huge Cock•Muscle Growth•Muscle/Strength•Man Scent•Size Increase•Infectious

Transform: Bully boy by Also Known As Sometimes a homophobic bully picks on the wrong guy. Added Jan 2014 15k views 3.6 stars (5 votes) 12k words •Huge Cock•Multicock•Muscle Growth•Muscle/Strength•Size Increase•Infectious

Transform: Coffee and cream by Also Known As Added Jan 2014 10k views 5.0 stars (3 votes) 3,172 words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Infectious

Transform: Coffee break by Also Known As Marcus’s favorite espresso dude at the coffee shop looks a little different today. Added Jan 2014 10k views 5.0 stars (3 votes) 9,093 words •Huge Cock•Multicock•Muscle Growth•Muscle/Strength•Size Increase•Infectious

Transform: Daniel by Also Known As Added Jan 2014 12k views 4.5 stars (2 votes) 4,735 words •Huge Cock•Muscle Growth•Muscle/Strength•Infectious

Transform: Fine art by Also Known As Added Jan 2014 7,492 views 5.0 stars (2 votes) 6,999 words •Huge Cock•Multicock•Muscle Growth•Muscle/Strength•Size Increase•Infectious

Transform: Friends in need by Also Known As Franklin refuses to let his best friend Albert induct him into the Muscle Club, despite the awesomeness of Albert’s body and the control over it he’s gained. Albert agrees to leave him alone. But Franklin is feeling these bursts of powerful arousal coursing through him as they’re playing video games together, and he knows Albert’s doing it on purpose… Added Jan 2014 11k views 5.0 stars (7 votes) 6,594 words •Huge Cock•Multicock•Muscle Growth•Muscle/Strength•Size Increase•Infectious •M/M

Transform: Morning wood by Also Known As Added Jan 2014 14k views 5.0 stars (5 votes) 8,923 words •Huge Cock•Multicock•Muscle Growth•Muscle/Strength•Size Increase•Infectious

Transform: Muscle City by Also Known As Emotionally, the Muscle Club has become a community of transformed men who are farm beyond normal. Now is the time to make it a literal community all its own—a city of transformed muscle. 21 parts Added Jan 2014 45k views 4.1 stars (17 votes) 120k words (#15) •Always Hard•Cock Growth•Huge Cock•Multicock•Straight to Gay•Muscle Growth•Muscle/Strength•Muscle Worship•Getting Handsomer•Size Increase•Infectious

Transform: Muscle club by Also Known As Added Jan 2014 16k views 5.0 stars (4 votes) 9,869 words •Huge Cock•Self-suck•Hyper Cum•Multicock•Muscle Growth•Muscle/Strength•Size Increase•Infectious

Transform: New Blood by Also Known As The formula Carlos developed, Transform, has made him and his friends into veritable gods. Soon their numbers will be growing, thanks in part to a video featuring a guy known only as Self-Suck Sam. 47 parts Added Jan 2014 43k views 4.2 stars (5 votes) 188k words (#5) •Always Hard•Cock Growth•Huge Cock•Self-suck•Multicock•Muscle Growth•Muscle/Strength•Muscle Worship•Man Scent•Increased Libido•Voice Deepening•Size Increase•First Time/Virgin•Infectious•Flying

Transform: Phone sex by Also Known As Converting a guy to be one of the Transformed is easy enough in person. But what about over the phone? Added Jan 2014 12k views 5.0 stars (6 votes) 5,573 words •Cock Growth•Huge Cock•Multicock•Muscle Growth•Muscle/Strength•Size Increase•Infectious •M/M•M/M/M

Transform: Promises, promises by Also Known As 2 parts Added Jan 2014 10k views 5.0 stars (2 votes) 17k words •Huge Cock•Muscle Growth•Muscle/Strength•Size Increase•Infectious

Transform: Teacher’s pet by Also Known As As students go, Raul is pretty cocky, and with good reason—even at detention with Mr. Titus and the rest of the Muscle Club. Added Jan 2014 12k views 5.0 stars (6 votes) 8,100 words •Huge Cock•Multicock•Muscle Growth•Muscle/Strength•Size Increase•Infectious

Transform: Teen Truman by Also Known As Added Jan 2014 23k views 5.0 stars (4 votes) 7,238 words •Huge Cock•Self-suck•Muscle Growth•Muscle/Strength•Voice Deepening•Size Increase•Infectious

Transform: The athletic supporter by Also Known As Added Jan 2014 11k views 4.0 stars (1 vote) 10k words •Huge Cock•Multicock•Muscle Growth•Muscle/Strength•Size Increase•Infectious

Transform: The college years by Also Known As The sexy teens affected by the Transform ability wreak even more havoc at college with their amazing and irresistible growth-at-will double-hung dream bods. 12 parts Added Jan 2014 22k views 4.8 stars (16 votes) 80k words (#33) •Cock Growth•Huge Cock•Multicock•Muscle Growth•Muscle/Strength•Muscle Worship•Man Scent•Size Increase•Infectious•Flying •M/M•M/M/M

U 2

Unbound Beast Inc. by an0n12 Jeff is working out late at night and encounters Ian who has substantially grown since he last saw him; Ian decides to be cocky and show off/seduce Jeff not taking into account the how effective the drug he's taking would be when he cums. Will it be too much for Ian or will he let his arrogance and lust get the better of him? Added Mar 2017 14k views 4.4 stars (18 votes) 4,024 words •Huge Cock•Muscle Growth•Muscle/Strength•Infectious

An unexpected inflation by UberPump A college athlete named Keith and his friends discover what it feels like to enlarge their cock and balls with the mysterious device Keith ordered off the dark web. When things go awry, however, their packages get huge. Keith and his friends go on a massive journey of cock growth, bloated balls, and near exploding junk as they inflate their man parts to their absolute limit. 41 parts Added Apr 2020 118k views 4.9 stars (60 votes) 99k words (#24) •Cock Growth•Cock Pumping•Cockfucking•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Cum inflation•Cum Milking•Hyper Cum•Public Orgasm•Addiction•Straight to Gay•Hyper Muscle•Pec Fucking•Immobility•Muscle Growth•Muscle/Strength•Public Nudity•Increased Libido•Breast Expansion•Getting Handsomer•Voice Deepening•Getting Taller•Forced Growth•Size Increase•Inflation•App•Nanotech•Incest•Brothers•Bisexual•Hetero Sex•Nonconsensual change•Bodily Fluids•Dildos/Toys•Infectious •M/M•M/M/M•M/M/F

V 1

Visiting home by Wicked Asher spent his entire first semester working out and gaining some serious muscle, but when he returns home for winter break, he doesn’t realize that he’ll be the one amazed by how much someone can change. 2 parts Added Jan 2016 41k views 4.8 stars (28 votes) 6,753 words •Huge Cock•Muscle Growth•Muscle/Strength•Size Increase•Age Difference•Incest•Father/Son•Infectious •M/M

Y 1

You and I by BRK and Jockmorphr When two lovers with the power to transform each other reunite after a separation, the results can be explosive. 4 parts Added Oct 2011 42k views 4.8 stars (13 votes) 12k words •Always Hard•Cock Growth•Huge Cock•Nipcocks•Nipple Emissions•Multi-abs•Multicock•Multihead•Multiarm•Multilimb•Multipec•Multitorso•Replication•Stacking•Muscle Growth•Muscle/Strength•Getting Handsomer•Tongue Growth•Mouthcock•Selfcest•Infectious•Merging •M/M•M/M/M•M/M/M/...