Naturists are not against clothing. Rather, we believe that you should dress only when appropriate. Being nude feels good. It makes you feel free. It takes away artificial inhibitions that many societies forced upon us when we were born.
Naturists believe in body acceptance.
As such, most report feeling less self-conscious on a nude beach than they are on a traditional clothed beach. If you think about it, the parts which we cover are arbitrary. It has been suggested that we cover the genital area because of its sexual nature. However, a quick survey of your day would show that those areas are used for non-sexual purposes the vast majority of the time. In fact, an equally sexual body part is your lips.