I had an idea a while back about a society where casual random public sex was the norm and to facilitate the practice, clothing was designed in such a way that genitals were exposed or were very easily accessible, for example, women either never wore panties under their skirts or wore crotchless pants as did the men. This could be Sci-Fi with the clothing being a type of spandex bodysuit with an easily opened crotch or maybe Ancient times and no one wore more than a toga. The point being that sex might be happening anywhere or anytime and no one is shocked or outraged, in fact, orgies might spontaneously erupt that could involve an entire city! Any additional ideas or suggestions?