That's only one side though: the other side is that people really like posting their own lives, particularly highlights like going to the beach. But they certainly wouldn't want to do that in the form of nudes. Nude beaches are supposed to be a camera free zone, and people are not interested in camera free zones. If it's not on Insta is did not happen, to paraphrase the Strava addict's creed. Nude beaches are dying because everyone has become too exhibitionist to go there.