Dave's rational brain was kicking back in again 'what the hell am I doing, I've gotta get out of here, I'm being disgusting' just as his body started pumping with the additional hormones and testosterone-shouting effects of the strap. His body was ready to burgeon out with the new changes and there was nothing he could do now... he felt himself swimming in hormones as he started jacking off. He didn't plan on it, he just couldn't help it, he had to get off quick.
Dave began fapping away and was soon ready to jizz all over his hands, moaning loudly as his body rapidly became more bullish, more stridently jockish than ever. His calves became more muscular, getting the diamond shape of a real cut jock, two muscle bulls to support thickening quads and hams. His ass thickened up into the ass of a tight end, his furry chest got thick pecs and his biceps hulked up nicely in accord with his newly wide shoulders; he looked like a senior player now in his prime. Even the chemistry guiding his fur had altered into a more deeply masculine cycle, as the wiry brown hairs thickened up and splayed out into coarser, darker hairs, much more obvious and immodest. If he had ever hoped maybe he could just shave his size 12 feet, they now hulked out another size into a broad 13, each toe even swirling with a little thatch of dark brown boorish fluff. He felt like his body was just packed with jock meat, now; he could feel his arms brush up against his lats, and it felt good.
Then he came, cum running through his hands down the dark hair of his muscle thighs, onto the ground. "Oh shit man, I'm a fucking jock, what the fuck" he said, though he could only focus on how much he liked it suddenly.
He felt like a magnificent creature and a man all at once, truly a stud to behold. He tried on the jock that had done this to him just to see how he looked in it, his pubes bulging out obscenely by the legs, but that was just part of the look with these straps. Flexing felt good. He rubbed a hand across the thick hair on his chest and that felt good.
Dave lifted up a pit and tried to see if he could lick his own fur. He could. Weren't jocks supposed to have a strong scent to them though? Maybe there was something somewhere in the locker room that would get him that, he felt an excitement he couldn't quite put a finger on yet.