Maybe I will find here an answer for something that always struck me in Germany (and to some extends in Austria and germanic part of Switzerland) :

"Why do Germans enforce nudity in sauna / hammam areas ?"

I don't mind people being naked (although I would not recommend it as a doctor), but I am always bewildered when locals demand it on clothed guests, as if they wanted to see them naked.

Where my logic gets lost is in the lockers, which are separated between male and female, and provide booth for unclothing in intimacy, before everybody joins the wet area, totally naked.

If anyone has hints, I would love to hear them for my own culture.