Joke Emergency: Fave Jokes Please!

Quick! What's your favorite joke? I have all sorts of newspaper interviews coming up in the next few days, and they all want jokes. They're rabid for jokes. Slavering, howling joke-hounds, those reporters, completely afraid of water, not afraid of jokes, and the worse, the better. If you give me permission to tell your joke, I'll tell it, and I'll tell 'em I got it from you, unless I've heard the joke before. I might just credit you anyway. So there. I'm silly. Tell me jokes!