Harrison Musonda

What does the phrase ubuchende bwa mwaume tabutoba in'ganda (translated: a man's adultery does not destroy the marriage) mean? On this culture warrior show Harrison talks about adultery like only he can? What are the roots of this cultural behavior? What about women? Is there a difference between men and women who cheat? According to wiki, "historically, adultery has been considered to be a serious offense by many cultures." so why do people do it anyway?