Same for me. Wasn't involved in sports in junior high or high school we didn't have to take showers after PE in junior high. In high school PE wasn't required if you were in the band, which I was. The first morning I lived in a college dorm I ventured into my first gang shower since I was a kid at summer camp. When I first went in nobody was in there, but as I was finishing up, two guys who lived down the hall came in. I was nervous, but quickly realized it wasn't that big of a deal. For the next four years I lived in the same residence hall (which sadly is no more) and came to enjoy the experience of the communal showers. My college years also helped me get over a lot of insecurities about my body, and to this day I don't have much problem stripping down in a locker room and walking to the shower carrying my towel, and using a shower at the gym that has minimal privacy.