As John lay in the bed, he began to change under the covers. He started as a 6 foot, 180 pound, 54-year-old man. As time passed his body began to shrink and loose weight and age. Two figures, formed from his own flesh, began emerging next to him in the bed. As they grew, John shrank, the three of them eventually reaching the same size of two feet tall, 90 pounds, and all three were John as he was at 18 - except each was only a third as smart as the original.
The original John woke up to find one of his other selves fucking him. He in turn began fucking the remaining John. All three were too horny and too dumb to care or question the situation much. As John played with himself, his memories slowly seeped out of his head, leaving him and his clones with no memories of who they were, where they came from, or how they got there. It didn't matter much to them, though, since their brains had made up for the lack of more useful thoughts with a desire to have sex.
Finally the three Johns had fucked themselves dry. It was morning and they could do nothing more than stare idiotically at one another, each occasionally playing with a penis in hopes of starting another orgy. Before they could, however, Mack entered the room. He was dressed in a black leather vest that highlighted his hairy, muscular arms and chest, and black leather pants that seemed to fit him well.
"Ah I see you decided to go au natural Mr. Roberts."
"Who's Mr. Roberts?" asked the Johns, looking at Mack blankly.
"No one you need to worry about anymore." He said, smiling and approaching the three. Now the real fun was about to begin.