Walking home one night from school I began to think about one of the boys in my class. He was so beautiful but I could never tell him, as I hadn't come to terms with my own sexuality yet. Just thinking about him made me hard so I slipped my dick out from inside my underwear and slid the foreskin back. The friction of my jeans against my cock as I walked was heaven.
A part of my route home took me along the side of a river and, since there was no one else around, I began to stroke myself through my jeans thinking about what he looked like naked.
After ten minutes it was too much for me. I unzipped and started rubbing my rock-hard member.
I imagined him there watching me and that made me ever harder so I started pumping faster and faster.
Just as I thought I couldn't take any more, that familiar feeling began to rise inside me. I'd never realised that there was a train line right next to the path but at that moment a train full of evening commuters slid past just as I shot my load into the air.
I still get hard just thinking about how many people could have seen me playing with myself that day.