Amazing. I wondered if this ever happened here in NZ. I so wish I'd been born 80 years ago not 30. I've seen pictures of St Leonard's beach in the 70s packed with naked revelers. These days I'm usually the only one naked and looked at like some kind of freak or deviant.
A little of topic, but we have mixed nude swims at an indoor city pool in Edmonton Alberta every 2 weeks in the winter. Another group has them every month. I attend both groups.
I swam naked at the Y for years, growing up. At 16 i became an Asst. Swim Instructor for ages 18 and up, all males and all naked together. It was great and I really enjoyed being naked with them
I always wondered what they would do if we got naked in the pool.... I havent ever tried it though!! (Sounds fun)
I too took swim lessons at the YMCA. My cousin and I were enrolled when we nine years old. When I told my older cousin that I did not have a swim suit, he said you won't need one, we all swim naked. So from that day on, I have been swimming in my birthday suit. I really enjoyed swimming nude. In High School, our pool was walled all around, so our swim class there was also nude swimming only. At our Y, I would volunteer to help young boys during their swim sessions. I also help during the Father-Son swim session. It was great to see so many fathers and their sons swimming together in nude.