I traveled in Europe several times and my wife and I on several occasions paid a bit more or found a deal to get four star hotels with public baths and saunas. Most people use them as you think you would with a bit of modesty and cover up. But on two occasions we got caught in a sauna where a Scandinavian or German family came in fully nude with their children who were also nude. I can accept being around other nude adults but even then I’m still uncomfortable. But when it came to children in public, we just quickly packed up and left … I don’t care what cultural differences there are, I’m not sticking around to even talk about it.