Father/Son

Stories that feature erotic and/or transformative liaisons between fathers and sons, or someone engaging sexually or transformatively with both a son and a father.

  Child of:  Incest. Related tags:  Brothers;Father/Son;Selfcest;Triplets;Twins.

  Tag Group:  Family.

A 4

Adventures of an Ivy League himbo by iHeywood This is a story all about how Liam Montgomery became the best himbo ever while a student at an Ivy League university. 2 parts Added Jun 2022 10k views 4.9 stars (15 votes) 5,749 words •Huge Cock•Hyper Cock•Nipcocks•Hyper Cum•Nipple Emissions•Multicock•Male Pregnancy•Incest•Father/Son•Set in the Future•Hyper Anus •M/M•M/M/M

Alpha product series by Chet Boner 19-year-old Trent accepts a free trial product series called “Alpha Product” in exchange for his feedback. He receives the first product very quickly, but doesn’t know how many people would be affected and grow as a result of this choice! 19 parts Added May 2017 Updated 11 May 2019 85k views 4.3 stars (43 votes) 23k words •Cock Growth•Huge Balls•Hyper Cum•Nipple Emissions•Muscle Growth•Muscle/Strength•Age Difference•Incest•Brothers•Father/Son•Stories with Images •M/M•M/M/M

Another big morning by Thatbadwriter It never fails. You’re sitting there on the living room floor with your cereal trying to watch some TV, when your dad comes down and decides Saturday morning is the perfect time to start growing and getting himself off. And then your horny brother comes home… Added Nov 2020 23k views 4.2 stars (5 votes) 1,226 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Muscle Growth•Muscle/Strength•Giants•Size Increase•Incest•Brothers•Father/Son•Destruction/Violence•Complete •M

The awakening by Johnny M Danny’s secret muscle-breast fantasy kink begins bleeding into the real world. 10 parts Added Jul 2012 62k views 4.7 stars (21 votes) 25k words •Hyper Cum•Nipple Emissions•Muscle Breast•Muscle/Strength•Age Difference•Incest•Brothers•Father/Son •M/M•M/M/M•M/M/M/...

B 1

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 Updated 6 Oct 2018 87k 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 5

Chris olympus by FanTCMan 3 parts Added Dec 2002 39k views 4.5 stars (21 votes) 9,167 words •Cock Growth•Straight to Gay•Muscle Growth•Muscle/Strength•Getting Hairy•Age Difference•Incest•Father/Son

The chronicles of Besar Otot by OneLuckyGuy89 On a distant unknown island near Indonesia called Besar Otot, Kenny Masters returns home a new man and intends to change his family as well. 8 parts Added Jan 2020 Updated 8 May 2021 20k views 4.0 stars (3 votes) 26k words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Multicock•Gender Swap•Straight to Gay•Muscle Growth•Muscle/Strength•Transformation•Getting Taller•Plausible Size Difference•Size Increase•Age Progression•Getting Hairy•Age Difference•Incest•Brothers•Father/Son•Nonconsensual change•Hyper Pheromones

Company guys by FanTCMan You can’t even imagine how excited Joey and I were, excited and scared, when Dad said he was going to give us the formula he’d been sampling. We were going to be models for what he called the Company. 2 parts Added Dec 2002 35k views 4.6 stars (11 votes) 7,919 words •Cock Growth•Huge Cock•Other Mental Changes•Straight to Gay•Muscle Growth•Muscle/Strength•Increased Libido•Getting Hairy•Age Difference•Incest•Father/Son

The construction worker by Peterbilt A troubled young hardhat named Jordan is helped through a series of self-discoveries by Joe, a father-figure who comes to mean more and more to Jordan. Added Sep 2015 26k views 4.9 stars (14 votes) 22k words •Cock Growth•Huge Cock•Muscle/Strength•Age Difference•First Time/Virgin•Incest•Father/Son

The cowboy by Chance Riverwind Added Jul 2002 19k views 2.1 stars (7 votes) 1,967 words •Cock Growth•Huge Cock•Muscle/Strength•Giants•Age Difference•Incest•Father/Son

D 10

Daddy’s little boy by TonnyGiant Jimmie returns home from college for the summer to rediscover just how drawn he is to his massive, muscle bear stepfather. 2 parts Added Sep 2018 Updated 11 May 2019 32k views 4.7 stars (11 votes) 4,961 words •Huge Cock•Muscle Gut•Muscle/Strength•Plausible Size Difference•Age Difference•Incest•Father/Son•Dom/Sub •M/M

Dad’s gift by John Y. For Jeff’s 18th birthday, his dad decides to give him something special and close to his heart—a donkey dick. Added Mar 2004 51k views 4.7 stars (27 votes) 4,994 words •Cock Growth•Huge Cock•Age Difference•Incest•Father/Son

Dad’s water balloon by PumpedBalloon Your step-dad is home alone with you for the week and on the first day, you and he discover a new bond through some exploration. You discover what it's like to feel a man in your mouth as he gets bigger in more ways than one. Added May 2023 5,109 views 5.0 stars (12 votes) 3,858 words •Huge Balls•Huge Cock•Man Scent•Belly Growth•Inflation•First Time/Virgin•Father/Son •M/M

Daemos island by Charles Westfall A Polish scientist and explorer, Ferdinand Rolcek, discovers a hidden island where the lost secrets of the Daemos, alien pioneers of masculine beauty and sexuality far beyond anything known to humanity, are finally revealed to him; and what he learns makes him never want to leave again. Don’t worry, he won’t be lonely. 6 parts Added Feb 2003 30k views 3.2 stars (20 votes) 15k words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Increased Libido•Size Increase•Age Difference•Incest•Father/Son•Twins•Destruction/Violence •M/t

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

Dana gets wired by FanTCMan A bit of software, a few connections, and you can enjoy making someone into a whole new man—especially if you have the right recruits to start with. 3 parts Added Jul 2002 23k views 4.3 stars (9 votes) 11k words •Muscle Growth•Muscle/Strength•Voice Deepening•Incest•Father/Son •M/M

A day at the beach by Thatbadwriter You watch in dismay and amazement as your father, who’s gained the ability to grow himself to giant size in a freak medical accident, takes a trip to the beach with you and decides to make himself bigger than he’s ever tried to become before. Added Aug 2019 13k views 4.1 stars (16 votes) 1,624 words •Huge Cock•Hyper Cock•Giants•Size Increase•Age Difference•Incest•Father/Son•Destruction/Violence

Days & Knights by iHeywood Bash wants to surprise his family by coming home from college for Thanksgiving early. But he gets a surprise himself. His dad is sucking his own massive cock. 3 parts Added Apr 2022 Updated 28 May 2022 9,786 views 4.8 stars (33 votes) 9,852 words •Cock Growth•Huge Cock•Hyper Cock•Self-suck•Hyper Cum•Muscle Growth•Age Difference•Incest•Father/Son•Thanksgiving •M/M•M/M/M

Dickville by OneLuckyGuy89 Rodney Finnegan and his four boys arrive in a Florida marshland town named Dickville. And it doesn’t take them long to figure out how it got that name. 2 parts Added Apr 2022 Updated 16 Apr 2022 13k views 4.4 stars (17 votes) 5,446 words •Cock Growth•Huge Cock•Straight to Gay•Muscle Growth•Man Scent•Butt Growth•Increased Libido•Getting Handsomer•Voice Deepening•Getting Taller•Size Increase•Getting Hairy•Incest•Brothers•Father/Son •M/M•t/t

Don’t talk about me! by jewelbee What if one day, everything someone said about you became true? Everything someone says to your face, whether lie, sarcasm, joke, hyperbole… would change you. 18 year old campus douche Nick learns this the hard way, faced with a curse after he led on the wrong girl. How will he get rid of the curse, and more importantly… just how much will he change in the meantime? 3 parts Added Aug 2020 Updated 10 Jul 2021 17k views 4.8 stars (45 votes) 4,348 words •Public Orgasm•Straight to Gay•Belly Growth•Getting Fatter•Retcon•Suggestion•Incest•Father/Son•Nonconsensual change

E 2

Empire by LenZelig A massive consolidation of the entire “Bill’s Education” universe, incorporating the previously separately posted “The Surfer”, “The Rescue”, “Spring Break”, “Pickup Trouble”, and “School Days”, “Empire” is the wide-ranging tale of easy transformation and even easier sex across all boundaries—friends, family members, genders, even species—as a fortunate crop of humans stumble into a wider universe of size, muscle, double-digit-length cocks and much, much more and discover the true meaning of shared, radical, uninhibited pleasure. 40 parts Added Apr 2019 Updated 1 May 2021 133k views 3.7 stars (6 votes) 366k words (#1) •Cock Growth•Huge Cock•Self-suck•Straight to Gay•Muscle Growth•Muscle/Strength•Getting Taller•Size Increase•Age Difference•Bestiality•First Time/Virgin•Incest•Brothers•Father/Son•Twins•Bisexual•Hetero Sex•Nonconsensual change•Sex-Slave•Shared Body•Aliens•Space Travel•Witch/Warlock/Wizard•Thanksgiving•Mind Control•Complete

Endmyths by Taur Reg Transformations spread through an entire town—but why? 12 parts Added Aug 2013 18k views 4.8 stars (6 votes) 19k words •Multilimb•Age Difference•Incest•Father/Son•Centaurs•Naga•Satyrs•Shapeshifting

F 2

A father and son’s inseparable bond by Salem Noctua Ezekiel finds a way to make his fraught relationship with his dad, Lucas, a little more intimate. Added Jan 2023 4,431 views 4.6 stars (27 votes) 12k words •Human to Cock•Incest•Father/Son•Nonconsensual change•Merging •M/M

The formula by hyperboi Mike begs his genius friend Jeff to try coming up with a cock growth formula. Jeff assumes Mike doesn’t want to look too small when he goes out for the swim team, but the secret truth is, Mike’s ambitions aren’t limited to his own junk. 4 parts Added Jan 2021 Updated 13 Feb 2021 26k views 4.9 stars (30 votes) 15k words •Cock Growth•Huge Cock•Hyper Cock•Self-suck•Muscle Growth•Muscle/Strength•Age Difference•Incest•Brothers•Father/Son•Twins •t/t•t/t/t...

H 2

The Henderson family reunion by EdIam The Hendersons are having a pretty standard reunion, until a seasoned mind controller with a particularly niche power decides to make it quite the life-altering occasion. Added Jul 2023 2,331 views 4.0 stars (3 votes) 13k words •Transgender•Gay to Straight•Other Mental Changes•Straight to Gay•Transformation•Incest•Brothers•Father/Son•Twins•Dom/Sub•Nonconsensual change•Hypnosis•Mind Control•Complete •M/M•M/M/M•M/M/M/...

His last hypnosis show by EdIam Paul has decided to put his long career as a hypnotist to bed… along with many of the new local men he’s meeting. 3 parts Added Mar 2022 3,908 views 4.3 stars (4 votes) 11k words •Straight to Gay•Public Nudity•Suggestion•Age Difference•Incest•Father/Son•Sex-Slave•Hypnosis•Mind Control •M/M

I 1

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/...

J 1

Jon the growing stepdad by spacevlad Austin’s mother passes away, leaving behind a special gift. Austin uses this gift to give his stepdad, Jon, a new direction and motivation. Jon is eager to impress his stepson. 15 parts Added Oct 2022 Updated 10 Dec 2022 32k views 4.6 stars (30 votes) 61k words (#46) •Huge Cock•Muscle Growth•Muscle Gut•Muscle Worship•Man Scent•Belly Growth•Feeding•Gradual Change•Getting Taller•Plausible Size Difference•Size Increase•Suggestion•Father/Son•Dom/Sub•Humiliation•Christmas•New Year’s Eve•Valentine’s Day•Complete •M/M

L 2

Love/shift by BRK Maxfield has very mixed feelings about leaving the city and all his tech behind to spend the summer after graduation halfway up a mountain in the family’s backwoods cabin—just him, his dad, and a whole lot of secrets. 11 parts Added Dec 2017 Updated 27 Apr 2019 43k views 4.8 stars (36 votes) 68k words (#43) •Muscle Growth•Muscle/Strength•Always Shirtless•Man Scent•Gradual Change•Transformation•Size Increase•Getting Hairy•Age Difference•Incest•Father/Son•Werebears•Supernatural•Complete •M/M

Lust & consequences by BRK Hayden manages to gain an ability that turns beliefs into truth, but the knack for making things turn out the way he wants them to is a lot more elusive. 2 parts Added Feb 2022 7,990 views 4.8 stars (15 votes) 6,212 words •Cock Growth•Huge Balls•Huge Cock•Wings•Hyper Strength•Getting Handsomer•Retcon•Suggestion•Age Difference•Incest•Father/Son•Flying•Complete•Medieval(ish) •M/M

M 11

Making the rules by EdIam Frank likes structure and rules in his home. Desmond likes corrupting families. Whatever could happen when the two meet? 2 parts Added Sep 2021 Updated 11 Sep 2021 7,602 views 3.8 stars (5 votes) 23k words •Other Mental Changes•Straight to Gay•Man Scent•Incest•Brothers•Father/Son•Humiliation•Nonconsensual change•Sex-Slave•Hyper Pheromones•Hypnosis•Mind Control •M/M•M/M/M

Mass X by Max Mann Five short stories of men getting bigger and sexier, through the use of “Mass X”. 5 parts Added Feb 2005 46k views 4.7 stars (16 votes) 19k words •Cock Growth•Huge Cock•Straight to Gay•Muscle Growth•Muscle/Strength•Increased Libido•Getting Handsomer•Getting Hairy•Age Difference•Incest•Father/Son•Christmas•New Year’s Eve •M/M

Massive by Alex Rif James finds the superhero costume his stepson had ordered from a strange website for Halloween, and decides to try it on. 2 parts Added Feb 2016 37k views 3.7 stars (17 votes) 2,851 words •Size Increase•Body Suit•Age Difference•Incest•Father/Son•Lycra/Spandex•Halloween•Superhero/Supervillain•Stories with Images •M/M

Matt and his dad by Meddler Incs When Matt comes home to visit his dad, he is forced into being part of The Crew. Added Jun 2020 14k views 4.4 stars (7 votes) 3,343 words •Huge Cock•Straight to Gay•Muscle Growth•Muscle/Strength•Incest•Father/Son•Nonconsensual change•Symbiotes•Hypnosis •M/M

Meta massage therapy by M.M.69 A mysterious new massage parlor opened in town, and brothers Jared and Jason have VIP passes. What makes this place so special? 3 parts Added Nov 2021 Updated 1 Jan 2022 12k views 5.0 stars (15 votes) 15k words •Always Hard•Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Multicock•Multihead•Boytaur•Four Legs•Multiarm•Multileg•Multilimb•Multipec•Multitorso•Replication•Straight to Gay•Hyper Muscle•Hyper Strength•Muscle Growth•Butt Growth•Getting Handsomer•Getting Taller•Plausible Size Difference•Size Increase•Retcon•Suggestion•Age Difference•Incest•Brothers•Father/Son•Selfcest•Dom/Sub•Pagan gods •M/M

Mountainheart by BRK It’s 1999, and Glenn, until now kept from his heritage, uncovers what it means to be a Sheridan. Fortunately, he has his closest friend, Eamon, at his side. 12 parts Added Nov 2021 Updated 9 Sep 2023 20k views 5.0 stars (25 votes) 60k words (#47) •Cock Growth•Huge Balls•Huge Cock•Muscle Growth•Muscle/Strength•Always Shirtless•Increased Libido•Gradual Change•Getting Taller•Plausible Size Difference•Size Increase•Age Regression•Getting Hairy•Age Difference•First Time/Virgin•Incest•Brothers•Father/Son•Werebears•Supernatural•Shapeshifting •M/M

Musclove, Texas by Max Mann Moving to Musclove, Texas with his sons to take up a new teaching position, Rick Long is startled to find a town full of huge, hung, and horny men, all of them eager to have the newcomers join them (in more ways than one). 9 parts Added Sep 2004 71k views 4.8 stars (50 votes) 26k words •Cock Growth•Hyper Cock•Hyper Cum•Muscle Growth•Muscle/Strength•Age Difference•First Time/Virgin•Incest•Brothers•Father/Son•Twins•Restraints

My roommate (complete) by LenZelig Bill’s hot adventures with his irresistible sex-god of a roommate, Andy Wang, and the others drawn into his adventures, combined with the stories of Andy’s son and his friends. (This revised and updated compilation version includes both “My Roommate” and “My Roommate: The Next Generation.”) 29 parts Added Jul 2002 Updated 19 Jun 2021 155k views 4.5 stars (25 votes) 223k words (#3) •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Age Difference•First Time/Virgin•Incest•Brothers•Father/Son•Bisexual•Hetero Sex•Dom/Sub•Witch/Warlock/Wizard•Gay Pride•Mind Control•Complete •M/M•M/M/M•M/M/M/...•t/t•M/t•M/F•M/M/F

My son home on leave by Peterbilt A story of sex between a man and his adult Marine son when he is home on leave. 2 parts Added Feb 2017 17k views 4.7 stars (11 votes) 18k words •Huge Cock•Muscle/Strength•Age Difference•Incest•Father/Son

My son is worried about his big cock by UnknownGentrifier Andy seeks his father’s advice about whether his cock really is too big, like his friends say it is. Added Oct 2020 9,722 views 3.5 stars (12 votes) 2,194 words •Huge Cock•Age Difference•Incest•Father/Son

My son, the superstud by Max Mann Thom is shocked to hear that his son Rusty has enrolled in a muscle-growth transformation experiment—and it’s already too late to stop him. Added Oct 2003 114k views 3.9 stars (33 votes) 3,842 words •Cock Growth•Huge Cock•Straight to Gay•Muscle Growth•Muscle/Strength•Age Difference•Incest•Father/Son •M

N 4

The new associate by Tym Greene Zhu is looking forward to his first day a new architectural firm, sure the way he grows—and makes other people grow just from being around him—will make things very interesting. 3 parts Added May 2015 Updated 12 Dec 2020 38k views 5.0 stars (2 votes) 13k words •Cock Growth•Huge Cock•Hyper Cock•Muscle Growth•Muscle/Strength•Public Nudity•Size Increase•Tongue Growth•Father/Son•Anthro/Furry •M/M•M/M/M

New neighbors by BRK Jimmy is starting to enjoy his first summer with his newly acquired wishpower when a very sexy couple moves in next door. The only trouble is, Jimmy doesn’t immediately recognize the true nature of their relationship, and by the time he does, it’s already too late. 2 parts Added Jan 2016 Updated 23 Nov 2019 19k views 4.5 stars (12 votes) 11k words •Huge Cock•Multicock•Age Difference•Incest•Father/Son

The night shift by Dreamtransformer Added Dec 2013 13k views 2.0 stars (2 votes) 1,239 words •Muscle/Strength•Age Difference•Incest•Father/Son

Not just imagination by DarkDjin Jampson’s overactive imagination starts to grow his cop dad and his friends...and somehow not only does it become real, but the men are pretty into it. 2 parts Added Jun 2014 Updated 5 Jul 2014 40k views 4.6 stars (38 votes) 11k words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Suggestion•Age Difference•Incest•Father/Son

P 3

Perfectly normal by EdIam John is working on reality-bending science… but perhaps he should vet his employees a little more carefully. Added Jan 2021 7,419 views 4.5 stars (13 votes) 8,364 words •Always Hard•Other Mental Changes•Straight to Gay•Always Shirtless•Retcon•Incest•Brothers•Father/Son•Nonconsensual change

Pool party by FanTCMan Two young men are nervous but excited. They’re about to show off their muscle transformation in front of all the guys at the pool! Added Dec 2002 21k views 4.7 stars (9 votes) 1,575 words •Muscle Growth•Muscle/Strength•Getting Handsomer•Age Difference•Incest•Father/Son •M/M/M/...•t/t•M/t

The Porter Men by Inclytos The Porters are a family of perfect men, all uniquely perfect in their own way. It’s how it’s always been, right? 3 parts Added Oct 2022 Updated 5 Nov 2022 11k views 4.7 stars (21 votes) 8,809 words •Cock Growth•Cock Shrinking•Huge Cock•Dom to Sub•Getting Dumber•Pec Fucking•Hyper Strength•Muscle Breast•Muscle Growth•Muscle/Strength•Always Shirtless•Butt Growth•Increased Libido•Retcon•Incest•Brothers•Father/Son•Twins•Dom/Sub•Sex-Slave •M/M•t/t•M/t

R 3

Reality Pack by Thorn What happens when the program you’re working on for school has a downloadable mod? You investigate it of course! 15 parts Added Nov 2020 Updated 27 Feb 2021 51k views 4.9 stars (38 votes) 79k words (#34) •Cock Growth•Huge Cock•Pec Fucking•Muscle Breast•Muscle Growth•Muscle/Strength•Butt Growth•Belly Growth•Gradual Change•Getting Taller•Plausible Size Difference•Getting Hairy•App•Age Difference•First Time/Virgin•Incest•Brothers•Father/Son•Valentine’s Day •M/M•M/M/M

The right settings by RoidTeen Ben finds an app and starts to play with it.  Added Mar 2023 7,920 views 4.8 stars (18 votes) 2,685 words •Cock Growth•Huge Balls•Huge Cock•Hyper Muscle•Muscle Breast•Muscle Growth•App•Retcon•Father/Son•Complete •M/M•M/M/M

The runner by LenZelig Jake is out for a morning run when he meets up with someone who is more than a man and looking for a different kind of exercise. Added Jun 2020 9,077 views 4.8 stars (4 votes) 8,270 words •Huge Cock•Straight to Gay•Muscle/Strength•Suggestion•Age Difference•Incest•Brothers•Father/Son•Bisexual•Hetero Sex•Dom/Sub

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 Updated 23 Dec 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/...

Sensational summer growth by OneLuckyGuy89 Todd and Aaron return home to their hometown of Portland as changed men. Now it’s time for them to change the rest of the town. 3 parts Added Apr 2022 Updated 7 May 2022 14k views 5.0 stars (3 votes) 8,409 words •Cock Growth•Multicock•Straight to Gay•Muscle Growth•Man Scent•Butt Growth•Getting Handsomer•Voice Deepening•Getting Taller•Getting Hairy•Age Difference•Incest•Brothers•Father/Son •M/M•M/M/M

Sheepish Sean by johnnyacolin Shy college freshman Sean gets a growth spurt that’s alarming enough to pay a visit to the doctor. 3 parts Added Nov 2021 Updated 9 Sep 2023 12k views 4.6 stars (26 votes) 4,921 words •Cock Growth•Huge Cock•Father/Son •M

Shirtbusters by TFWizard Jared, Lance, and Lance’s father Ben discover a way to bust out of their shirts, and they can’t get enough of it. 2 parts Added Oct 2005 47k views 4.1 stars (15 votes) 6,769 words •Muscle Growth•Muscle/Strength•Size Increase•Age Difference•Incest•Father/Son

The simulated universe by Thorn A group of men play a new board game that can simulate a “universe” where they play as trailblazers and are granted boons, which could lead to a few…enhancements. 6 parts Added Jul 2023 Updated 19 Aug 2023 10k views 4.9 stars (25 votes) 26k words •Cock Growth•Huge Balls•Ball Growth•Huge Cock•Muscle Breast•Muscle Growth•Voluptuous Men•Butt Growth•Belly Growth•Increased Libido•Foot Growth•Gradual Change•Transformation•Getting Taller•Plausible Size Difference•Size Increase•Getting Hairy•Inflation•Age Difference•Father/Son •M/M/M

Snow in the North Pole by iHeywood Snow doesn't know what to do with his life after barely graduating high school. Maybe Santa will have an idea. Added Dec 2022 2,059 views 4.3 stars (6 votes) 1,255 words •Huge Cock•Incest•Brothers•Father/Son•Christmas •M/M•M/M/M

Spice by Mr. X and Mad Dog In this epic story, the transformative powers of a certain substance are tested by a couple of very horny guys. 50 parts Added Oct 2009 Updated 9 Nov 2019 226k views 4.4 stars (60 votes) 221k words (#4) •Cock Growth•Huge Cock•Other Mental Changes•Hyper Muscle•Hyper Strength•Muscle Growth•Muscle Theft•Muscle/Strength•Muscle Worship•Man Scent•Foot Growth•Gradual Change•Transformation•Voice Deepening•Getting Taller•Size Increase•Getting Hairy•Age Difference•Incest•Father/Son•Supernatural•Gay Pride•Alcohol •M/M•M/M/M

Spin the bottle by EdIam Matty lives in a pretty homophobic area with pretty homophobic friends, but maybe a magically-enhanced game of spin the bottle can help loosen them up? Added Aug 2021 5,192 views 3.8 stars (5 votes) 9,825 words •Huge Cock•Straight to Gay•Incest•Father/Son•Dom/Sub

Suggestions by Jack the Mindbender Jack is surprised by how quickly his hot stepfather goes from a closed book to jerking off right in front of him… Added Dec 2018 11k views 4.4 stars (10 votes) 2,749 words •Huge Cock•Suggestion•Age Difference•Incest•Father/Son•Mind Control •M/M

Super serum by Jack is Jacked Jack’s dad develops a way to grow muscles and decides his son should try it out. Added Mar 2023 8,638 views 2.9 stars (7 votes) 1,649 words •Cock Growth•Muscle Growth•Muscle/Strength•Muscle Worship•Public Nudity•Increased Libido•Getting Handsomer•Voice Deepening•Getting Taller•Size Increase•Getting Hairy•Father/Son•Hetero Sex•Complete •t/t•M/F

T 4

Taste the rainbow by OneLuckyGuy89 Luke, Josh and Matt are called to New Orleans by their old friend, Jeremy. Luke’s 21-year-old son joins them, excited to be able to drink. The bar is known for making beer with fresh fruit in it, but little do they know the side effects they’re about to experience. Added May 2023 5,391 views 4.6 stars (10 votes) 2,497 words •Cock Growth•Ball Growth•Huge Cock•Muscle Growth•Voice Deepening•Getting Taller•Size Increase•Getting Hairy•Incest•Father/Son•Complete •M/M•M/M/M•M/M/M/...

Toy story by LenZelig During a storm Bob stumbles across a strange webpage offering something called “The Ultimate Sex Machine”. Intrigued, he clicks “order”, expecting maybe a sophisticated sex toy. Instead he gets Randy, a hunk-shaped machine dedicated to ensuring that Bob experiences ultimate sexual possibilities from now on and willing to reshape reality to make it happen. 2 parts Added Jul 2002 30k views 5.0 stars (27 votes) 6,947 words •Muscle Growth•Muscle/Strength•Age Difference•Incest•Father/Son•Twins•Androids/Cyborgs•Space Travel•Complete •M/M•M/M/M/...•t/t•M/t

Triple threat by Thorn Lovers in a newly-formed polyamorous relationship are about to have their lives changed when the youngest member of the relationship introduces them all to a new miracle serum meant to enhance men.  2 parts Added Sep 2023 Updated 9 Sep 2023 4,860 views 5.0 stars (6 votes) 16k words •Cock Growth•Huge Cock•Muscle Growth•Father/Son•Nonconsensual change •M/M/M

Twin studs by Anonymous 3 parts Added Jul 2014 18k views 4.0 stars (22 votes) 43k words (#86) •Huge Cock•Multicock•Multiarm•Multilimb•Age Difference•First Time/Virgin•Incest•Brothers•Father/Son•Twins

U 2

Ultimate muscle by Ultra-Muscle Philip gets injected with what he wants most—something that will make him a big muscle man like his dad. Added Dec 2013 29k views 3.6 stars (7 votes) 1,418 words •Huge Cock•Muscle Growth•Muscle/Strength•Age Difference•Incest•Father/Son

Unicorn Frappuccino: Refill by Tym Greene This sequel to “Unicorn Frappuccino” sees the purple-tracksuit-wearing wizard at his new job, making a delivery to a Starbucks that, four years later, still offers Unicorn Frappuccinos to their customers. And of course unicorn magic comes into play to make things a little more…flavorful. 2 parts Added Jul 2021 2,930 views 4.5 stars (2 votes) 10k words •Transformation•Human to Animal/Anthro•Father/Son•Nonconsensual change•Anthro/Furry•Witch/Warlock/Wizard

V 2

Vacation by muscle.growth Just a simple vacation sleepover with Matt, Alan, and Alan’s dad working on something weird in his basement lab. Added Feb 2009 21k views 4.7 stars (9 votes) 1,860 words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Age Difference•Father/Son

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 Updated 11 May 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

W 1

Werequeer by Pfieffer A dad helps his son through his first transformation into a WereQueer. Added Apr 2004 31k views 4.9 stars (18 votes) 2,426 words •Cock Growth•Huge Balls•Hyper Cock•Hyper Cum•Transformation•Age Difference•Incest•Father/Son

Y 1

Y-M-C-Gay by M.M.69 An ordinary guy with an extraordinary ability gets the guy of his dreams. Added Nov 2021 8,759 views 4.8 stars (13 votes) 2,646 words •Always Hard•Cock Growth•Huge Balls•Huge Cock•Public Orgasm•Extra digits•Multi-abs•Multicock•Multihead•Boytaur•Four Legs•Multiarm•Multileg•Multilimb•Three Legs•Multitongue•Multitorso•Replication•Straight to Gay•Muscle Growth•Public Nudity•Getting Handsomer•Gradual Change•Getting Taller•Retcon•Suggestion•Incest•Father/Son•Selfcest •M/M•M/M/M

Z 1

The Zeke chronicles by Sean Reid Scott Zeke, an 18 year-old gorgeous stud, was already big before some very special visitors seem to have given him a special ability to grow and grow, bigger and bigger, stronger and stronger. 7 parts Added Jul 2013 Updated 19 May 2017 48k views 4.4 stars (19 votes) 28k words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Muscle Worship•Getting Taller•Age Difference•Incest•Father/Son•Dom/Sub •M/M•M/M/M