Usually when there is a perfectly good man waiting at home.
Ole Man: Yeah, I'm gunna divorce her, know any good lawyers?
Chap: Divorce? What'd she do pull a Minnie Mouse?
Ole Man: No shit! She's fucking Goofey!
Taken from an old joke that went along the lines of
Q: Why did Mickey Mouse divorce Minnie Mouse?
A: He found out she was fucking goofy.