As David made his moves on Bobby, he was careful to keep the jockstrap between them. He forgot that the jockstrap was alive, as they embraced clad with condoms, Carter's waist band expanded around David's waist. As David pulled out of Bobby, the condom dropped away leaking its contents on the jockstrap.
Just then a high pitched voice shouted, "David! Hey, dickhead are you here?" It was David's kid brother Troy. The door opened and Troy walked in looking out the doorway at the two dogs fucking in the hallway. "You know there are a couple of shepher--What the? David? Hehe, you look like shit!"
The young man with the giant penis for a head collapsed in a stinky wet brown heap.
Troy grinned. He was a quick study. "This is better than the Arabian Nights! I wish you were my big slave boy and had obey my every wish."
David was back, a bit taller, a bit more muscular with the word SLAVE tattooed across his chest. Wicked, thought Troy, but it wasn't right. He looked at the hairy crotch with the huge dick. Then he knew, and smiling said, "I think you should be a big hairless eunuch, bro."
And he was.
"Slave boy, tell me what's going on!" he ordered.
"Yes, master," David went on to relate all he knew about the magic jockstrap and the transformations of the other young men.
"Good thing, I can't cum yet. And I've tried, so I guess I'll be running the show from here on out. I think maybe, Bobby should be a flying magic carpet, and Carter can be a bat, and you, slave boy, can go beat the carpet..."