Food for Thought: Oh No She Didn't

I'm diggin in the crate for new ideas. So topic for discussion, what makes a woman knowingly sleep with another woman's husband/boyfriend, or vice versa what makes a man sleep with another man's wife/girlfriend?


I am curious the thought process of the "other" woman/man. I bet some people are shaking their head saying "Oh no she sidn't". "Oh yes I did" (lol). So have at it.