I'm sixteen, and was on holiday with mum and sister Emma 14, in June this year in Rhyl, North Wales, in the UK. It was a lovely warm day, we were in town shopping, I was dying for a pee, I went into the loo, down this side street by the market.
When I got in there was a guy I suppose about 19, standing at the urinal, I started peeing and I noticed him looking at me, I looked over he had turned to face me he was wanking himself, I don't know why but I got hard instantly.
He asked if I wanted to wank I just looked and said nothing, with that he took hold of my cock and started rubbing, after a couple of minutes I came really hard all over his hand, with that he wiped his hand on his hanky and left.
I got myself together, went outside where mum and Emma were waiting, I just said there were people waiting that was why I was a long time.