Just because someone is naked doesn't mean they are obnoxious if they are "fat" or "thin" (what is "acceptable" then). Also it's etiquette to carry a towel to sit on this avoids t/f of germs. And why would men get erections, it's very unusual to see an aroused male on a nude beach or in nude social events, yes it MAY happen but it's a natural phenomena! Look at the hundreds riding in the World Naked Bike rides in London,Brighton,Manchester etc naked men and women and no complaints by the thousands who see them!

So live and let live, Nudity is Natural, to be Naked is to be Yourself!