lovebeigecardigans1955 they call themselves naturists, but yes, you are right. etiquette is to put a towel or other covering on the seat. We lived in Vera Playa, Andalucia, for two years and the nearest beach was a naturist one. We did go and I got used to it after the initial slight shock at male bits bouncing around as they walked along the sand
. You didn't have to strip, but most did. There were a couple of restaurants and cafes along the beach and one held our nearest internet facilities, until we got our own.