Aged around 17 and being a typical horny male I often frequented a swimming pool with changing rooms at the poolside. After swimming for a while and choosing the right time with many girls in the pool, I would enter my changing room to dry off and remove my swimming shorts to start rubbing my cock. With the door slightly open I would try to attract the attention of a lone girl by waving my towel and show her that I was naked with a huge erection. I was successful on countless occasions to satisfy their curiosity and my own pleasure by showing my cock poking out from my body with many hanging on to the poolside for the duration until I finally spurted on the floor in full view. I had learned to target girls in their early teens who were swimming alone so as not to be too embarrassed in having to share the experience with another confirming that they were enjoying the sight. For me it was a fulfilling experience seeing them watch in amazement most probably because they were seeing an erect fully grown cock for the first time and watching the cum spurt out.