Stuff like naturist clubs, nude beaches, or imagine if the city you live in decided to allow nudity for a day at a local park or pool.
(of course, public sex would still be outlawed)
We all look the same, male or female. It doesn't appeal to me. I think most people look better with clothes on. If you ever watch documentaries about small obscure undeveloped countries you will see how mostly nude people live primatively. I think you are asking from a vouyeristic point of view.