A man walks into a bar, after buying a beer he looks around the bar and sees three men and a dog playing cards.
Amazed, the man wanders over and starts watching the game.
After watching the game for ten minutes, the man leans over to one of the other player’s and whispers “
Wow, that’s a really smart dog!”.
The man whispers back “He isn’t that smart, every time he gets a good hand, he wags his tail!”
This joke is included in the Black Book of Jokes. You can order it from here.