I copied this from a friend; it just hits the nail on the head.
(1) FINE: This is the word women use to end an argument when she knows she is RIGHT & YOU need to SHUT UP.
(2) NOTHING: Means SOMETHING & you need to be WORRIED.
(3) GO AHEAD: This is a dare, not permission, do NOT do it.
(4) WHATEVER: A woman's way of saying SCREW…… YOU.
(5) THAT'S OK: She is thinking long & hard on HOW & WHEN you will pay for your mistake.