It seems a gynaecologist
who was getting sick of his job, decided that he needed a career change. He'd always enjoyed tinkering with engines, so he thought he'd become a mechanic. He went along to mechanics school, and the final test was to strip the engine completely and reassemble it back into perfect working order. So our gynaecologist friend took the test and anxiously awaited the results. When he received the results he got quite a surprise--he had received a score of 150%! He quickly phoned the instructor and asked about the score. The instructor said "No, no, that's the right score. First I gave you 50% for stripping down the engine--a very thorough job. Next I gave you 50% for reassembling it--a fantastic job, really. Then I gave you a 50% bonus for doing it all through the exhaust pipe.