Mark started taking his clothes off. "Man" he said "My ass has developed a massive craving for your cock."
Joe lowered his pants, revealing his massive erection. Like most teenage guys in the new world of universal bisexuality created by Joe's wish, there was a pronounced sexual element to their friendship. Mark loved being fucked in the ass, and Joe loved fucking him.
"What are you boys up to up there?" yelled Mark's mom.
"We're fucking, Ma." yelled Mark.
"OK, then." replied Mark's mom. She was glad her son had found a boyfriend and spent so much of his time having sex with him rather than getting involved with drugs or gangs. She herself was going over to the Kowalskis that night for their regular Thursday night three-way, and it was good to know she could trust Mark to stay out of trouble.