I once walked in my room at college and caught my roommate jerking in my underwear.
He started to get up all embarrased and I stopped him and told him to finish. As he laid back he watched me strip and when my cock flopped out he began to moan. I pulled a chair up close to the bed and as he was close to cumming I pushed my cock against his lips.
Later, he told me he jacked off twice a day. After that, he sucked me off everyday and I watched as he jerked off every day.
He even told me that he wore my underwear from time to time.
I was best man at his wedding and his bachelor party was a great experience!