> in Europe breast is more or less indecent to show in public.
There is no single "Europe". I have seen many women sunbathing topless in Denmark - it seems to be totally acceptable there. Haven't seen that in France - but it has a very strong nudist culture dating back at least to the 60s. Some of these nudist beaches are actually famous e.g. Cape d'Agde.
And then we didn’t even talk about Spain, and all the German tourists in, say, Mallorca. If anything, this is a stark difference between the EU and the US, in general — the EU is much less afraid of a nipple being shown in public, both in arts and everything.
I once attended a local one man show where the actor's private parts were exposed for a second or two (by accident). There were a lot of kids in the audience (including mine). I was a bit uncomfortable for a second but we laughed it off with the friends.
There is no single "Europe". I have seen many women sunbathing topless in Denmark - it seems to be totally acceptable there. Haven't seen that in France - but it has a very strong nudist culture dating back at least to the 60s. Some of these nudist beaches are actually famous e.g. Cape d'Agde.