Well, in an effort to keep you informed:
GUTS - is arriving home late after a night out with the guys, meeting your wife
with a broom in her hand, and you saying, "Are you still cleaning,
or are you flying somewhere?"
BRAINS - is coming home late after a night out with the guys,
smelling of perfume and beer, lipstick on your collar, you patting your
wife and saying, "Hey, you are next."
'Medically' speaking, there is no difference in the outcomes !!!