HOW DID YOU KNOW?

A man is driving around the English countryside in his Porsche. He stops outside a field of sheep, walks up to the shepherd and says, "I've got an offer. I'll guess how many sheep you've got in this field, and if I guess right, I get to take a sheep with me. If I guess wrong, you get my car."

The shepherd thinks he's on to a sure thing and agrees.

"137," says the driver.

"Damn me, you're right," says the shepherd, and he dutifully hands over a sheep.

The man walks away, stuffs the sheep in his car and is about to drive away when the shepherd knocks on his window.

"I've got a proposal for you," says the shepherd. "If I can guess what you do for a living, I get to take your car. If I'm wrong, you can have all my sheep."

"Done," says the driver.

"You're a consultant," says the shepherd.

"Bloody hell! How did you guess?"

"Well," says the shepherd, "You come in here uninvited, you tell me what I already know, and then you charge me for it."