A joke that a 6-year-old got me with ...
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Kid: What kind of mouse walks on two legs?
Me: Um ... I don't know.
Kid: Mickey Mouse! Now, what kind of duck walks on two legs?
Me: Um ... Donald Duck?
Kid: No, all ducks walk on two legs! What are you, stupid?
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Yeah, he got me. In my defense, I've told the joke to several adults, and everyone gives the "Donald Duck" answer. I'm nicer than the kid, in that I don't call them stupid.