This story took place in December 2003.
One night after being out all day with my buds I decided I would go to sleep earlier than usual. My roomate and I would usually stay up till 3:30am or so, then would retire for the night. However I was really exhausted and needed to get some rest for final exams the following morning. So I stripped down to my jockstrap and went to bed at about 12:00am, leaving my roommate awake at his desk chatting online as usual.
I quickly fell asleep and was out for the night, or so I thought. At around 5:00am, I found myself hot in the stuffy dorm room and unable to sleep. I lay in bed awake, but didn't make any sounds or movement because of the noise I heard coming from my roommate's bed. After a couple of seconds of hearing the squishy lubricated noise of jerking off I myself got hard as a rock. I couldn't help myself. I slipped my dick out of the side of my jockstrap, reached under my bed and got my lotion, lubed my shaft up and proceeded to jerk myself off in a very non discreet way. I heard my roommate jerking faster and faster and as he sped up, so did I. Not too long after, I'm assuming he finally came because I no longer heard the squishing sound. Just the thought that he was a mere five feet away and had cum sent me over the edge.
Evidently he must have realised I was awake and asked 'Are you awake?' I replied with 'Yeah' and he then asked 'What are you doing?'. Stupidly, I replied 'Nothing', but what else was I to tell him, that I had just orgasmed all over myself listening to him jerk off? I suppose maybe if I would have said something to that effect we might have actually become jack off buddies or more, but being a straight guy I don't know if I would go for 'more', although a lot of the dudes on this site who claim to be straight also enjoy the occasional guy to guy action, so who knows.
We never discussed that night again, though I often thought about it while jerking off at night with my roommate sleeping no more than five feet away from me. Hopefully this year when I get my new roommate assignment I'll get someone who is laid back enough to jerk off openly.