Nudity taboos generally are quite arbitrary, although there is a very strong tendency for people to think their particular nudity taboos are "natural", or "divinely inspired" or some such flapdoodle. A woman who believes it is indecent to expose her face to public view is in no important way different from a woman who believes it is indecent to expose her breasts to public view.

A law saying that nobody shall give or receive public services with any portion of their chests covered would be met with the derision it deserves. An otherwise similar law about faces should be met with similar derision.