Modesty as politeness

I think one important matter about modesty that people do not bring up much is that a breach of modesty (if it does really occur, I have my doubts) is not immoral, it is a breach of etiquette. That is, in almost all cases, at worst, impolite. Unfortunately, and I say this as a big fan of Miss Manners and etiquette in general even if I may at times ignore it, the dictates of polite society weigh more heavily on women than on men.