They take nudity seriously. Read about them here. Disorganized nudity You don't need to join an organization, of course. It's quite possible to be naked at home, without any lessons or practice at all. Just take your clothes off.
Many people do.
And then they put up Web pages to tell about it. Perhaps one of those pages is how you happened to get here in the first place. Read here about nudity as a normal part of life for some people. You might be rather surprised at how easily nakedness is compatible with everyday life. If it's thought of at all, it is considered only with embarrassment and the predisposition to suppose anyone who does take it seriously is a bit eccentric, weird, or worse.