Tickled To Orgasm

My first orgasm was in the scouts. I was just turned 13 and we were away at camp. Till then I'd had a couple of wet dreams but that was all. On the last day of camp about five of us were wrestling, at one stage the other four had me pinned down and were tickling me to death. After about five minutes of this I felt a weird sensation and after they finished I went to the shower stalls and there were my pants covered in cum. It was so intense but it has never happened again