A guy and his manager go down to the docks. The manager is betting every longshoreman he sees that his guy can screw and satisfy 100 women in a row, without pausing. Bets are made and they agree that they'll meet the next day.
The next day, 100 women are lined up along the dock and the guy drops his pants and starts. True to his word, he moves from one to the next, satisfying each one without pausing: 1.. 2.. 3.. on and on he goes: 49.. 50.. 51.. He slows down somewhat: 83..... 84..... 85........ but he is still moving from one to the next and the women are still satisfied: 97............ 98............. 99................ and before he can get to the last woman he has a heart attack and dies.
The manager scratches his head and says, "I don't understand it! It went perfectly at practice this morning!"