The difference between "guts" and "balls":
Guts - is arriving home late after a night out with the guys, being
assaulted by your wife with a broom, and having the guts to ask:
"Are you still cleaning, or are you flying somewhere?"
Balls - is coming home late after a night out with the guys, smelling
of perfume and beer, lipstick on your collar, slapping your wife on
the ass and having the balls to say, "You're next."