DAVE: (talking to a supervisor about a different co-worker) Go easy on her. You're only nineteen once, and I'm sure you were just as bad.
EAVESDROPPING COWORKER: That's not true.
COWORKER: You're not only nineteen once.
DAVE: Um. Yeah you are. You're nineteen for exactly one year.
COWORKER: Not true. You can be as old as you want to be.
COWORKER: For example, I never stopped being twelve.
DAVE: You never stopped being.... twelve?
COWORKER: I've been a twelve year old boy for more than fifteen years.
DAVE: Stay away from my kids.
Yeah, this pretty much happened, word for word. My supervisor roared with laughter, and we proceeded to good-naturedly tease my co-worker.