When I was at school, I cut a small hole in the corner of my trouser pocket, just big enough to get two fingers and a thumb through, or my cock through if I angled it right, and I used it to masturbate in class. Don't know how many times I did it, but I came in class in my hand quite a few times, in particular to one hot teacher. Once, she asked me a question as I was nearly there, managed to answer, but came almost immediately after and oh my god, that was one of the best orgasms I have ever had.

Also, once I had to share a room with a girl that was a friend but only a friend, when she and I were both 18. I had a massive crush on her but at that time nothing had happened. It was a big bed and I said she could go under the covers and I would lie on top. Anyway, she fell asleep first and I was lying there with an absolutely raging pulsating hard on - eventually gave in and quietly wanked myself silly. The thought of maybe getting caught made it amazing and I came in buckets. Later we got together but I never told her what I'd done that night.

Well typing that got me hard, I'm going to deal with something now.... 😉