A surgeon picking up her car after a service and some minor repairs was highly indignant at the size of the bill.
“All this for a couple of hour’s work?” she said. “You charge more for your work than I do.”
“Well, yes,” the mechanic said. “That’s how it should be. You doctors have been working on two models of the same make since time began but we’ve got to learns about new makes and models every year.”