Many people, men, in particular, seem perfectly happy about looking at porn sites, but seem to view normal nakedness as disgusting.
There has been a furore on Facebook about Blackpool Sandcastle having a private naturist night. I couldn't believe the way people were ranting about it being 'unhygienic' and that they wouldn't use the place again after the slides had been 'polluted' by naked people. A large proportion of the complainants were men.
As for children being allowed to take part, and see all this rampant nakedness, and be naked themselves...well...you can imagine all the posts about paedophiles, child pornography, and contaminating the poor childrens' minds.
it's no wonder that teenagers have strange ideas about what a normal human body looks like, when the consensus seems to be that everyday nakedness is evil.