A man is lying in the hospital waiting to be the first person in history to receive a brain transplant.

A doctor comes in and says, “congratulations. Unfortunately, since this is a new procedure, your insurance isn’t going to cover it all. So we’re going to give you three choices for brains and you can decide which one you can afford.”

The man says to the doctor, “Okay, what are my choices?”

The doctor says, “Well first, there’s an engineer’s brain: that’s $100 an ounce. Then there’s a scientist’s brain: that’ll cost you $200 an ounce. Finally there’s a politician’s brain: that’s the most expensive at $1,000 an ounce.”

The man looks at the doctor, surprised. “That’s absurd! Why is the politician’s brain so expensive?”

The doctor turns to him and says, “Sir, do you have any idea how many politicians it takes to get an ounce of brain?”