The next morning, Biff peeled into the parking lot in his Camaro, feeling even more smug than usual. He had taught that nerd, Jon, a lesson and it had worked out even better than Biff had expected. Not only had Jon gotten his comeuppance for spilling that drink all over Biff's varsity jacket, but Jon had been blamed for acting like a creepy little pervert and Biff had gotten off scot-free.
Biff strutted through the halls, joking with his buddies and flirting with the girls. During class, he received a message on his phone. He peeked at it when the teacher wasn't looking - it was a message from Sarah McMillan, and it said "I want your meat rocket in my hot pocket. Usual place?" Biff messaged back a confirmation, and could hardly wait until lunch.
Biff and Sarah had discovered that the school janitors were out of the building for the entire afternoon, and their office was abandoned during that time. It was a simple matter to get a key for the room after that - Sarah volunteered to do some cleaning and had a couple of copies made at the mall - and since then they had been using it for private afternoon hookups.
Later that day, Biff slipped into the janitor's office, and found Sarah already waiting for him. He locked the door and they began making out. He felt himself getting hard as he peeled her tight top off of her, and undid her bra. Her large, soft breasts spilled out and he fondled them, enjoying that he got to see something nobody else in the school did (as far as he knew - he was actually sorely mistaken on this point). Then Sarah started taking his clothes off.
Biff enjoyed his lithe, muscular body almost as much as Sarah did. His athletic prowess and natural fitness made his muscles sleek but well-defined, and he kept his body totally shaved because of his swimming career. It wasn't long before he was totally naked and Sarah was sucking away on his eight-inch erection.
A sudden shiver passed down Biff's spine and he felt himself climaxing much faster than usual. He tried to warn Sarah (she hated it when he came in her mouth) but he wasn't fast enough. He felt himself cumming harder than he ever remembered in his life, and he grunted and bucked while he did it.
Sarah pulled her lips off his cock, and looked at him, saying "What's the matter, Biff?"
"Sorry I came in your mouth," said Biff, and Sarah gave him a puzzled look.
"You didn't..." she said, then stopped in mid-sentence. "Hey, did you put on a condom?"
It was Biff's turn to be puzzled. He was sure he had shot a huge load into Sarah's mouth, but she didn't seem to think so. And he hadn't put on a condom - he didn't like them, and was counting on Sarah's birth control to deal with any issues (he figured it was really her problem anyway). He looked down, and sure enough, his hard dick appeared to be covered in some kind of plastic or latex, although it didn't seem to have the little pouch at the tip that a condom should have.
Bifff reached down to feel his cock and got another surprise. It weirdly didn't feel like he was touching himself - not only did his dick feel like plastic, he wasn't getting any sensation from touching it. At least, not any sensation beyond the vague pulling in his body.
Biff pulled at it, trying to get the weird plastic stuff off of his schlong. To his shock and horror, the whole thing came away! It was accompanied by a weird sliding and slipping sensation from his crotch. Biff dropped the thing in horror, and what looked like a large, double-ended rubber dildo fell onto the floor with a PLOP!
Sarah, still on her knees, fell back onto her rear end, her hands over her mouth. "Biff, you have a... a..."
Biff reached down to his groin again, desperately feeling for his dick, certain that the thing he had just dropped was not him. All he found, however, were some alien-feeling - but extremely moist and sensitive - folds and a small hole. He leaned over, trying to get a better look at it, and felt dizzy and light-headed when he realized that he had an honest-to-god pussy where his dick had been moments before.
