But there's something weird about it. Just like when you look at previous periods in time and now they look weird, often just reactions to previous epochs or other cultures (like the neoclacissim came as an opposition to rococo and baroque).

This feels like it. It doesn't feel natural. It feels like it is purely out of a contrarian way of thinking, about how forward thinking they are, "look how superior we are that we are completely void of instinct to cover ourselves". and perhaps somewhat of a sexual counter balance to the strictness of the rest of their culture. I'm not sure i'm explaining this in the best way. I think there is a natural middle ground, the one that we have seen throughout hunter gathere human history, and Nordic countries are just being culturally weird by going to one extreme.