When I was a sophomore in high school, I was on a band trip to Florida. There were four guys to a room (so two guys per bed).
One night, I really had to jack off, but there was no private place. So as my roommates were watching TV in their beds, I got under the covers, with my bedmate next to me, to wank. I started rubbing my cock through my shorts. Then, when it was hard, I whipped my dick out. I began to slowly stroke it, trying my best not to move or make noise. After a couple of minutes I felt myself about to cum. I pointed my dick toward my feet and shot a huge load. That night I had to sleep in cum-soaked sheets!