In a battle a general was shot in the butt, and he called a surgeon to treat his wound. The doctor came to have a look, and then cut off the arrow shaft with a big pair of scissors. "Done!" the doctor said. "What?!" the general, angrily cried, "The arrow head is still in my butt." "My surgical operation is finished. The arrowhead in your butt should be taken out by a physician who practices internal medicine."