Once upon a time I was an exchange student in Germany and one of my classmates had this story. At night her host family took her to a lake to swim. My classmate says "oh my gosh, I never saw so many naked people in my life!"
All the families were out, naked TOGETHER hanging out, going for a swim. She said she wouldn't go. Her host mother said, "Why not? It's so nice in the water with no clothes..."
It's hard for me to imagine that scene as well, but the difference of opinions was definitely funny. It was an innocent day at the lake. :)