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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.

Kinds of “Infectious” stories include:

    Other tags that also fall under the category “Partner-Related Changes”: Absorption, Body Swap, Hyper Pheromones, Merging, Shared Body.

    Stories found: 70.

    Something missing? We’re always looking to improve the way our stories are tagged. If you know of a story that should be added to this page, please go to the story page and use the tag suggestion feature—the link is directly under the list of tags.

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    Complete story list for Infectious:

    • Field agent by BRK  Btaur Cent CGrow 4Legs Cock Infect XArm XCock XLeg XLimb MGrow Grow  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.  Added Apr 2020  •  2.7K words
    • Huge changes: Book two by RdyRoger(2 parts)CGrow Hair Balls Cock Infect MGrow Musc Nonc PSD Grow Series  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.  Added Dec 2017  •  9.9K words
    • Hulk hunter by JayPat(2 parts)CGrow Viol Giant Cock HyCock Infect XAbs MGrow Musc Nonc Grow Tf Series  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.  Added Sep 2018  •  11.1K words
    • The hulk pill by JayPat(5 parts)Cock Infect MGrow Musc Nano Grow  The only thing weirder than your buddy Boz offering you a “hulk pill” would be for it to actually work.  Added Oct 2012  •  29.5K words
    • Jake: hand-drawn giant by spacevlad(7 parts)Infect Gut Musc Grow  Drawing massive, muscle-hunk football stars seems like a safe enough hobby—but what if your drawing takes on a life of its own?  Added Sep 2009  •  11.8K words
    • The journal by Braun1(11 parts)CGrow Hair Balls Cock Infect MGrow Musc Grow  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.  Added Feb 2003  •  30.5K words
    • Porn can be healthy by Egi(2 parts)CGrow Cock HyCock Cum Infect  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!  Added May 2017  •  8.7K words
    • Quarantined by MuscleNexus  Infect MGrow Musc Nonc  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  •  1.9K words