A gynecologist was getting tired of his job and decided to switch
 careers.
 
 He'd always enjoyed tinkering with engines, so he enrolled in a
 school for car mechanics. When the class ended, the students were
 given their final exam: strip a car engine completely and
 reassemble it in perfect working order.
 
 The gynecologist did his best - and was amazed to find he scored
 150%. "How could that be?" he asked.
 
 "Well," said the instructor, "I gave you 50% for taking the engine
 apart. Next, I gave you 50% for reassembling it - a really
 fantastic job. And then I gave you a 50% bonus for doing it all
 through the exhaust pipe."