Yes! Having fooled around with some doctor play with a neighbor boy, in junior high school I became a locker-room voyeur. Never enjoyed gym class much, but the changing and showers were a complete joy. Athletic supporters were optional in junior high, mandatory in senior high, and there were random jock checks during roll call when you had to pull down the front of your gym shorts to show your jock. Most boys wore white brief underpants in those days, so it was a nice parade in the locker room, then when we all had to change out of our underpants into jocks, even more eye candy!
There were swimming classes as part of phys-ed; for boys swim suits were not allowed, nor in senior high so there were many great sights. We were expected to soap shower thoroughly before pool, and the gym teacher inspected us as we exited the shower room - mostly by rubbing our arms or wrists to see if anything came off. If he sent us back to the showers to get clean, we earned a whistle cord across the bare butt after roll call. Sometimes the coach would lean down to test the ankles of some of the boys - I like to think now that he did that when he wanted a better look at some nicely developing boy.
In junior high, there was plenty of variety: very small and bare like me, to sparse pubic hair and growing genitals, to surprisingly hirsute young men with adult size penis and testicles. So much fun to watch and learn!
I watched a couple boys with great interest in 8th or 9th grade locker-rooms. G. was a carrot-top fireplug but very athletic and went out for all sports. He had a little ginger bush above a stubby boy cock, and small-apple round scrotum; always changed out of white briefs into a jockstrap, and took a lot of time with a towel between his legs after showers (showing off?). While a warm shower generally caused a lot of boys’ genitals to hang a little lower, his never did. I always tried to get a locker near his so I could watch, although the “jocks” usually liked to be together.
M. was a very slender average height boy who played varsity basketball. This kid was baby smooth, tiny balls, but had a flaccid pencil-penis that had to be at least 8 inches long. I watched in awe as he walked to the showers, cock bouncing from thigh to thigh, and it seemed that he didn’t mind showing off despite his quiet demeanor. How could such a small guy be so big “down there” I wondered!