This is my arena. Adult sexuality.

One thing I've noticed. Girls I pick up in bars in America vs Europe (or maybe they pick me up). In America, more than a few times, during a sexual act or after, the girl has said "I don't normally do this!" It's a lie, but she views herself as bad for being "easy". I always end up playing therapist in these contexts, assuring her of the normalcy of her sexuality and in a few cases I described how parents raise their daughters to be anti-sexual causes them to feel worse about sex than guys would. Also, twice, those girls have texted me later thanking me because I helped them feel better about themselves.

In Europe I have never experienced this. No girl has ever tried to do damage control about "I'm not normally like this". Girls were more forward and less shamed.

Yes, that is an insane anecdote and you have no idea which parts of Europe and America I am speaking of (it matters) but there it is.

So yes, it is highly social. Anthropological evidence shows this as well, also the Kinsey research.