Junior year, I had a roommate who was never there - he had a girlfriend off campus and stayed there all the time.
I had a suite-mate, Danny, who came in one evening. His jeans were unbuttoned. He was Puerto Rican and hot as hell. I kept staring, and he finally pointed to his crotch and said "you want?".
Yeah, I wanted.
He exposed his 8-inch uncut cock and I went to town.
For the rest of the year, he used to come into my room, just drop trou and I'd get him off. Sometimes I'd be asleep, and he would wake me up by rubbing his dick in my face.
He had a girlfriend, but I guess he needed a little extra help.