I was 13 and went to local public swimming pool for the afternoon, got changed into trunks and had swim and lounged around admiring the boys and girls in their skimpy swimwear.
I was wearing speedos so it was very obvious that I had a hard on which got quite a few giggles from the girls, but I didn’t care I enjoyed them seeing it then it was time to go so went back to changing rooms and showers.
I took my trunks off to have shower, there was quite a few people in there guys and boys so not much space between us but found a space and got under shower.
Each side of me was a guy both totally naked too a few people did continue wearing their trunks, so I started showering and enjoying the warm water cascade over my body and especially my cock which quickly got hard again, then I noticed the guys next to me had both also got hard ons.
One of the guys turned round in the shower and as he did do his hard cock brushed against my thigh, it was a bit of a surprise but not an issue he then started to rub his cock and I could see that he was staring at my hard cock whilst doing it.
This turned me on so I started to also rub my cock I was side on to the wall and the other guy was behind me and then I felt something lightly touch my bum and realised it must be his cock.
Now there was only the three of us plus two others left in the shower so was probably the reason the guy behind me felt he could start rubbing his cock up and down my bum cheeks and push it in between them a bit, that was when I shot my load for the first time in the swimming pool changing rooms.
I finished showering and went to dressing area still with a hard cock to dry and dress.