Distinction between Guts and Balls

To those nit-pickers who argue the meaning of words, is there a medical distinction between Guts and Balls?  Both are common use terms,  but do you really know the difference?  If not, here are the definitions:

GUTS - is arriving home late, after a night out with the guys, being met 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, with lipstick on your collar, and having the Balls to slap your wife on the butt and say, “You're next, Chubby.”

I hope this clears up any confusion on the definitions. Medically speaking however, there is no difference in the outcome. Both result in death.