No matter what the activity, a nudist is always properly dressed for it. As well, some people simply like the freedom of movement that not wearing clothes provides. For some, the lack of clothing provides medical benefits. Fresh air and sunlight,taken in moderation so as not to get sunburned, of course, are a boon to the health of one's largest organ, the skin. This is not to mention the microbes and parasites that just love clothing as a hiding place for when they're not attacking you.
Children grow up without shame attached to their bodies.
They know what the functions are and don't go around attempting to sneak peeks at each other in locker or rest rooms through peepholes. They don't view gender differences or nudity as something dirty or smutty. Sure, you've heard those things said before, but there are other benefits that most people don't know about. Some of these things seem incredible, but aren't, especially when looked at in the cold light of logic. For one thing, there is virtually no child abuse among nudists.