I (21) came back from class one afternoon and passed my roommate (21) leaving for a rehearsal. When I got back to our room, I found a tissue lying next to the garbage can. I went to throw it away and realized it was a ball of tissues. My curiosity got the better of me, so I opened it and found a puddle of half-absorbed cum. The smell was intoxicating and I felt my cock swell in my sweatpants. Knowing my roommate had had an orgasm minutes before made me so fucking horny. I dropped my sweats to my ankles and furiously stroked myself. Thinking about him moaning as he climaxed sent me over the edge. I came so hard that I felt light-headed.