Like people everywhere, the Japanese have their favorite proverbs. People are not what they appear to be. Akujo no fuka-nasake.
Ugly women are more passionate.
Akusai wa hyakunen no fusaka. A bad wife is 100 years of bad harvests. Atama hagetemo uwaki wa yamanu. Philandering is not stopped by a balding head. Au wa wakare no hajime.