Incontrovertible

If you are wearing a baseball cap, and it is not positioned front-and-center on your head, then one of two conditions must be true.

• You are a catcher in a baseball game in progress.
• You are a moron.

For the record, I have found active catchers to be a tiny minority of the backwards-cap-wearing population.

— Frenulum

(Nothing to do with erotica, but I have been wanting to get that said for the longest time.)