"Okay Joe, even if this is another stupid prank and you were only pretending again, I just can't leave you, after all you used to be my frie... OH MY GOD! What happened to you Joe?!"
Little did he know, Devon was too late. Had he decided to leave the classroom a few minutes earlier he would have had a chance to stop Joe from starting to jerk off in hope that once he cums, his mind would clear up again. It didn't take long for him to realize that it wasn't the smartest idea, but by then Joe didn't really care as much. There was so much pent-up jock cum in his balls that a couple strokes was all it took for him to explode all over his chest, but instead of the expected release, his mind only clouded up more and the urge to keep on jacking off grew stronger.
Joe tried screaming for help, shouting that he can't stop himself from running his hands across his massive, fat cock that was now all shiny and lubed up with jock cum. Joe kept on showering himself with his loads until all cries for help were suppressed by pleasurable moans. Eventually he started noticing that each time he shot, he grew even bigger and hairier, if he were as smart as he was a week ago, or even earlier this morning, he could probably figure out that his transformation wasn't over and he was still changing to look like Jeff, the jock whose nasty sweat had started it all.
But at that point Joe was so far gone that even if he did, it would have probably only make him jerk off faster. His body hair was growing out so thickly that Joe was almost starting to look like a real life sasquatch, but the sight of all the countless strands of thick, jock cum that were hanging from his fur and the beard that now sprouted from his face was turning on Joe so much that he couldn't care less. His expanding ballsack was providing an unlimited supply of cum and he wasn't going to let even a single drop go to waste. Jeff and Simon were so hot and soon he will be just like them, maybe even hotter, but he shouldn't stop there, it would be so much sexier if everyone else was a horny, big dicked jock too!
Joe moved his head closer to his furry armpit and took a deep whiff of the sweaty stench and shot another load across his chest at the thought of changing all these wimps in his class and making them stink just like him, he should start with this huge nerd Devon, he'd been following him for the whole week so clearly he wanted to be big and stinking just like Joe.
That was the moment Devon walked inside the bathroom, the sight of his former friend as a cum-drenched bigfoot was too much for him, and all he could do was stand there petrified as Joe walked up to him, grabbed his head and pressed his face tightly against the sweat and cum soaked fur on his chest.
"Jock cum good... gonna make you big and hot like Joe..."