I read somewhere there’s a tradition of skinny dipping in the US; YMCA pools were nude only up until the early 70s and boy’s schools had nude only swimming lessons (defies belief tbh)up until the same time.
True. I learned to swim at the Y (1961),and we were all stark, staring naked including the adult instructor. Nobody thought much about it. Parents (strong Catholics) didn't care either. Heven't swam nude since. Or swam much period.