A man sees a sign in front of a house, ""Talking Dog for Sale."" He rings the bell and the owner takes him to the back garden where the dog is tied to a post. ""Can you talk?"" asks the man. ""Yep,"" says the dog.""I discovered this gift when I was young. I decided to help the government, so I got in touch with the CIA. In no time they had me jetting from country to country, sitting in rooms with spies and world leaders, because no one would think a dog would be eavesdropping. I was one of their most valuable spies eight years running. The jetting around really tired me out though, I wasn't getting any younger and I wanted to settle down. So I signed up for a job at the airport to do some undercover security work, mostly wandering near suspicious characters and listening in. I uncovered some incredible dealings and was awarded a lot of medals. Later, I got a wife, had some puppies, and now I'm retired."" The man is amazed. He asks the owner how much he wants for the dog. ""Ten bucks,"" says the owner. ""That's a low price for such an amazing dog,"" says the man. ""Why on Earth are you selling him?"" The owner replies, ""Because he's such a huge liar.""