Locker Room Prick How Can I Keep From Getting Unwanted Erections In The Locker Room Showers?

How can I keep from getting unwanted erections in the locker room showers? - locker room prick

I'm a good boy, 13 years and developed in very good shape. After work I sometimes have to take showers in the communal showers in the locker room. I started off right as I and semi-***** over the entire shower. How can I prevent this?