Guts or Balls

We have all heard about people having guts or balls, but do you really know the difference between them?
I have given some examples below to help you make the distinction.

GUTS- Is arriving home late, after a night out with the boys only to be met by your wife with a broom, and having the guts to ask "are you still cleaning or are you flying somewhere"?

BALLS- Is arriving home late after a night out with the boys, smelling of perfume, beer and with lipstick on your collar, then having the balls to slap your wifes arse and say, "your next fatty".

Have you done either .......?????