You decide to turn Randy into a muscle stud, same as you. The idea makes the veins in your massive dick throb. You can tell this pathetic nerd is in awe of the massive fuck rod in front of him. You spit into your hands.
"Turn around, twerp."
You're a muscle stud, with a bitch who needs some breeding. You strip off his slacks and tighty whiteys. His dick is hard, although only 5 inches long. You laugh when you realize he actually wants you, what a fag. But it wouldn't matter if he didn't. You bend him over and start off slow, grunting as you enter him, grabbing his hips. What a fat pig you're impaling on your pike. He squeals in pleasure and pain. You go faster, caught up in instinct. Your tight, hard body rams him over and over with bone-crushing force. This feels like tackle practice. Man, do you love football. You finish with a roar, with your balls churning a massive spray of cum inside Randy. Some of your seed spills out to the floor. Randy sighs.
He opens his eyes and you no longer see the scared nerd in him, but a confidence that only radiates from being king of the school. A real jock. But you don't see any changes in his fat body. What's wrong? You pour some supplements into your hand, and order Randy to swallow them all. He obeys. You're still hard so you fuck Randy again. Still no changes in his body. But he tells you he wants to wrestle. By now, he has no clothes on. Definitely a jocky attitude. You pin him over and over, but he gives a good fight each time. Each time Randy loses, you punish him with another fucking, not that he minds, though. Instead of doggy style, you make him lie on his back before you plunge into him. He feels up the mounds and valleys of your hard body, and you flex and pose for his touch. You work up a sweat, and your muscles feel pumped. Hell, your pecs feel a little fuller, and your arms look so BIG now.
You wrestle through the night, with each match lasting longer and longer. You notice as you breed Randy in between matches, that he's burning a lot of fat tonight. You take a break for protein downstairs, in the kitchen. Suddenly, Randy tenses up. Shuddering, he grabs the kitchen counter. He screams. His muscles had been starved for raw material, and now you've given it to him. His ass bulges out like a hockey player's. His legs become tree trunks, with deep tear drop cuts. His biceps are boulders. His lats are solid wings of muscle. His neck disappears into shelves of flesh. He turns around. His face is now hard and angular, with a jutting brow and jawline. He looks like he's in his mid 20s now. He still has a belly, but it looks like a frat boy's beer gut. You suddenly realize his formerly bare skin is now dotted with blond stubble, covering his forearms, face and chest, and connecting in a trail down to his crotch. His balls hang down like oranges, and his dick is a fucking beer can. Randy looks down and feels up his new body.
"Woah, Simon. Not bad. I could get used to this. But how did you get that body? Who did that to you?"
Your name's not Simon. You've been playing football since 8th grade, you tell him. Randy remembers your football-related clothes on the floor of your room and figures that the football team somehow recruited you. But not in the same way that you just transformed him, because he's got his nerd mind intact while you're just a dumb football player now. He'll investigate the football team tomorrow at school.