our school pool requires like swimsuits. like everyone wears speedos but last year some of us did go out to the pool naked for a bit before coach came out and told us to go back to the lockerroom for our suits. it was mostly a dare but it was still kinda a swimming naked at school experience. i didnt know that they used to have naked swim in schools allowed tho. thats pretty cool. swimmin naked just like feels better anyway.
when I first went to school and we had swimming it was always rumoured that if you forgot you kit you had to swim nude but it never happened. in fact if you forgot your kit you usually ended up doing lines or detention
we all changed in one big open area and so you all saw each other naked anyway whilst we were changing and we all had to wear trunks - I think it was school regulation black or blue speedo type trunks, you certainly were not allowed board shorts or anything like that.
When we came out it was all naked for showering, and I can't imagine it happening now, but the teacher would be standing outside as we lined up we all took our trunks off as we went into the showers. It wasn't something we really thought much of at the time and anyway it would seem quite normal that you would shower with nothing on