I've always had an exhibitionist streak, but it really took off my first year in the college dorms. I shared the cramped space with another guy, but luckily he was gone a lot. He was straight, with a girlfriend who had an insatiable appetite for fucking.
He licked and nibbled both my cheeks as his hands massaged me, coming teasingly close to my crack before moving away. Every time I lost control and thrust my ass up at him he bit one cheek and slapped the other.