How do people react to each other on nude beaches?

During clothing optional situations like those on a nude beach, it is natural that men will respond with an erection when they see a sexy woman. Mind you, no woman ever got upset that a man had an erection seeing her and ladies in the nudist lifestyle actually expect men to respond positively to their nudity (otherwise why would they go around naked?) and here is that special moment that when a topless busty babe passes by a naked man he gets an instant hardon. I guess this is just a way to greet people in the nudist community.