My biggest fear in school was being naked in the gym showers. I was terrified of getting a boner in front of everyone. It would be the most embarrassing thing ever! I managed to keep things under control until one day after school at cross country track practice. I cut out early because my asthma was acting up and was all alone in the showers when it happened. It actually felt sort of thrilling in a taboo way. I turned off the water and pranced out bouncing and swaying but was suddenly paralyzed by an unexpected classmate. I felt like my life had ended as I stood there dripping, but all he did was smile and give me a nod of approval. Then he turned and opened his locker like everything was cool.
I actually had an entire girl's PE class stomp through the boy's locker an shower room while I was bathing post weightlifting class.
It was interesting lol.
No idea how the teacher didn't think to check to see if anyone was still in there. But I hear voices and footsteps and step partway out of the shower room and there's a passle of girls just walking and talking.
As they notice me poking my head out, one of them squealed a little, so I jumped back and grabbed my junk lol.
This did not stop most of them from going right on by though. They went to the "ball pit" aka the storage room where gear was kept, got their basketballs and then went back past again. A few whistles, some laughter, and a greeting from a friend were all that really reacted much tbh.
Yeah I was similarly terrified in the showers but secretly checked out the variety of other guy's junk in the changing rooms - who was getting girthier, longer, more tanned, all very interesting to a then closeted bi guy. Didn't think to fantasize about it until I left school, strangely.