A joke? Yeah I can do that.
A man visits a casino and sees a man who is playing a game of poker with his dog. The man, very impressed says to the owner of the dog, well that is a fine intelligent dog you have. No, answers the dog owner. That dog of mine is in fact a bit stupid. Why is that, the man is asking. It is the very first dog playing poker I have ever seen. Well, the dog owner says. Whenever my dog has good cards, he is wagging his tail like crazy.