When I was in College I lived in the dorms and my roommate would stay up and play on his computer after I would go to bed. One night I stayed awake long enough to watch him pleasure himself in front of the computer, it was so hot the way his face looked and how he let out little moans as his cum shot all over!
A few days later I stayed up later than him and was masterbating in front of my computer when he woke up and caught me and said 'that looks like a lot of fun, can I help?' I was amazed but said sure. He grabbed my penis and began stroking it very slowly, it felt so good. He got faster and faster and I began to moan uncontrollably and then squirted cum all over his hands, he then asked if I could help him and so I jerked him off and when he came he asked if I would eat it and so I licked his cum off my hands, it was delicious. We continued masterbating together for the rest of our time as roommates, great way to bond.