If youi grow up with nudity being a somewhat normal thing, I do think that you get less distracted / aroused by the presence of naked humans. I myself tend to agree with
@****BG - getting aroused or not by presence of a subjectively attractive women does not depend on the amount of clothes she's wearing (or lacking), it doesn't make a difference if she's naked or not.
As for nude sunbathing, FKK beaches or saunas - there is nothing I hate more then people getting sexual in environments where I just want to relax and not being bothered by other people's sexuality. It's public, and public sexuality is only ok where everyone agrees to be part of it. This is not the case in any FKK areas or saunas (unless it's special "sauna clubs", they exist). The fact that people take others being naked as consent to being involved in sexual things grosses me out - just because somebody is naked, it doesn't mean the person is horny or even wants tto interact with anyone sexually (or at all).