Starting in fifth grade we showered after gym class. Gang showers all through middle school, high school, college. I wasnt an athlete, and didnt like gym much, but had no problem with showers.
You could always tell the guys who enjoyed looking at each other in the open school gym shower.We didnavert our eyes at all, and gazed freely at each other .There wasnt a lot of of talking,but a lot of unabashed looking.