Years ago college dorm roommate and I never discussed jerking off but we both did it and knew each other was doing it. Several times I would awaken in the night to hear him going at it, which aroused me and I would shift in the bed to quietly join him; the heavier breathing and rapid sound of skin flapping let me know he was about to bust. Then, most mornings I got up earlier that he did and went down the hall to shower and when I would come back to the room there would be all sorts of bedcovers being shifted as I opened the door and interrupted his session. Later, when I would return from the early morning class and he was gone to his class I would open the door to the aroma of sex because he always cleaned up with tissue and put them in the wastebasket (I always conveniently slipped my evidence in my robe pocket and flushed it while in the bathroom). There was a couple of days that he had the early class and I could sleep in and I took full advantage to have a long, slow session. One morning his class got cancelled and he returned to the dorm unexpectedly. Much to my embarrassment he walked in the door and there I was on the bed with the cover pushed back, pajama bottoms pushed to my ankles, erection in right hand, knees bent slightly to give my left index finger access to my anus. Nothing left to the imagination there. I quickly pulled the covers over me and pretended I was about to get up. The guy let me suffer by taking a seat facing me and striking up a conversation while I figured out how I was going to gracefully get up with my pj's around my ankles and my naked mid-section. Probably wouldn't be nearly as embarrassed by it all today.