It forms part of it. It is revealed there by an emotive influence. There are situations, between peoples, which seems to accept a total impudor. And even to require it. The field of the forbidden.
Any human society gives itself rules of prohibition with respect to sexuality.
Every one knows that the concupiscence of the flesh is in the field of forbidden. Some are clearly conscious, others are not. The expressions of modesty are physical and verbal. More exactly, modesty causes reactions, at the same time in language and in body behaviour . Beyond the the diversity of manners and fashions, it concerns men as much as it does women.