A gynecologist wants a change of pace so she decides to become a mechanic. After 2 weeks training, each student in her class is required to take apart an engine and put it back together again.

The gyne got a grade of 150% that a fellow student complains. The teacher replies, “Well, she took it apart right, so there’s 50, she put it back together right, so another 50. But she got an extra 50 for doing it thru the muffler!”