Who’s there?
To.
To who?
No, “to whom.”
Who’s there?
To.
To who?
No, “to whom.”
Listen up, dummy! This joke is all about grammar, something you clearly need help with. The setup is a classic knock-knock, but the punchline messes with "to" versus "to whom." It's funny because it calls out the improper use of language. Get it now, or do I need to draw you a picture?