This is the magic key. Because nudity is divorced from sexuality in these spaces (it happens at a volleyball game, a potluck dinner, a swimming race), the brain stops associating "bare skin" with "sexual threat." This lowers cortisol (stress) and raises oxytocin (bonding).
Naturism challenges societal beauty standards by removing the "armor" of fashion and branding, forcing an encounter with the "real" human form in all its diversity. http videos purenudism com pageant sample 1 wmvzip hot