The unknown ... became for our primitive forefathers a terrible and omnipotent source of boons and calamities visited upon mankind for cryptic and wholly extra-terrestrial reasons, and thus clearly belonging to spheres of existence whereof we know nothing and wherein we have no part.
Customs do not concern themselves with right or wrong or reason. But they have to be obeyed; one reasons all around them until he is tired, but he must not transgress them, it is sternly forbidden.
Are these things good for any other reason except that they end in pleasure, and get rid of and avert pain? Are you looking to any other standard but pleasure and pain when you call them good?
The convention missionaries call "modesty" has no standard, and cannot have one, because it is opposed to nature and reason and is therefore an artificiality and subject to anybody's whim - anybody's diseased caprice.