Mathematics is no more computation than typing is literature.
Mathematicians are a bit like the laconic Vermonter who, when asked if he's lived in the state his whole life, replies, "Not yet."
Certainty a strange Ferris wheel of a statement!
The Internet is the world's largest library. It's just that all the books are on the floor.
Defined broadly enough, mathematics encompasses everything.
The only bit of logic-based public bathroom humor I know is: the difference between men and women is that between the statement [P and not Q] and the statement [Q and not P].