To be sure, my mother did not have a lock on this one. Everybody's mother said this, but my mother added that you wanted to wear clean underwear so that you wouldn't get treated like a booger if you DID have an accident.
I might have been able to go a very long time without addressing this one, but for the fact that I recently encountered a young woman who chose the sans underwear option. Right. Out in the world with no drawers. And the only reason I (and about fifty other people) knew was because the wind blew, exposing her bare flesh. One witness, a man who obviously felt that all present should be informed, shouted and shared the news.
Sad as that was, my mother, the world's leading Mamaknologist would have been immediately appalled that a woman would think so little of herself. She would wonder why any woman would leave her home with her hair and nails done, and wearing what she thought to be a well-planned and fashionable outfit, only to leave her most precious physical asset open and bare to the world.
The Mamaknologist take on this is: Why? Why would you leave your body so publicly exposed? You don't know who's out there, and what they're bringing with them. Yes, I know that the AIDs virus does not survive once exposed to air, but we all know that there is so much else "out there," including perversion aided and abetted by video and the internet. Even if she thought she looked good with her personal and private parts made so public, why would any woman crave such negative attention in the first place?
This is not totally a question of home training or even sanity and though we might spend, or waste, hours postulating the answers, the bottom line is that a woman who cherishes herself and the gifts she brings is never going to abuse those gifts. The bible speaks of casting, "pearls before swine," but the Mamaknologist knows that if you don't respect yourself enough to cherish the gifts of your body, mind, and spirit, you can never expect anyone else to, either.