I'm sure that's the crux of it. My own experience of nude beaches is that it feels normal and is very relaxing. You see other people nude and they are all normal bodies with all sorts of variety.
My experience after visiting nude saunas and beaches in Germany is that you're in an environment where no matter what someone's body looks like, the social responsibility is to be casually respectful, and not make a big deal out of someone's body regardless of whether it's normal, or exceptional in a positive or negative sense.
This helps one put into context that it doesn't actually matter so much what your body looks like. You can be beautiful or hideous, and still have a right to relax and feel comfortable and go about your day.
I think that clothing has a way of amplifying our curiosity and reinforcing taboos. When you strip away the clothing you learn to relax about this whole business of fixating on how your body might compare.
Depends on the distribution of bodies, which ones you focus on, and your attitudes to beauty in general. Seeing a bunch of normal things doesn't magically make those normal things all suddenly beautiful or okay, beauty and aesthetic desirability are almost always about the exceptional, practically by definition.
You can put me in a room full of mostly obese people, and tell me this is normal and representative of average (which it may well, in America), and you aren't going to change my mind about that obesity being ugly or undesirable. There are actual facts here, beauty and attractiveness aren't purely socially constructed.
EDIT: The only actual supporting non-correlational "study" is funded by British Naturism, and has 52 participants, with all the usual hallmarks of bad social psych as well https://research.gold.ac.uk/id/eprint/28407/1/2020.03.09%20M...
Is the problem that it would actually address more the skewed distribution of scantily-clad bodies that people are actually exposed to (e.g. heavily weighted towards thinner and more attractive people in media (social and traditional) and porn)?
I.e. it doesn't matter if you know that certain body types that are currently deemed desirable are rare or unrealistic if you still know that those are what are desired. Also, it isn't just desirability, but our knowledge of associations with health (obesity has undesirable health consequences, regardless if it is accepted or not; being fit over just "average" is again better for health and general ability) that also play into this, and are not changed really by any knowledge of the distribution of body types.
At the end of the day, attraction and desirability just aren't purely socially constructed (see: role of symmetry in attraction in basically all species with sexual selection), so you can't fix the problem with naive little things like this.
The core conclusion "makes you feel better about yourself" is really a no-brainer if you regularly go to a sauna. Plus, as bonus, it's healthy for your cardiovascular system, your immune system and probably for your skin too.
A lot of other cultures don't have this level of unease around nudity.
> you've been brain-washed to think that is OK
Some of us have learned new things in the past 170,000 years
> now all people find it offensive
This entire post is about how many people do not find it offensive
There are literally subreddits dedicated to finding communal showers that kids use. They have FAQs on how to deal with erections when families are around.
Some people care so much about other people being nude that I can only assume they're diddlers.