Three samurai meet to decide which is the greatest swordsman. The judge approached the first samurai and opened a small box. Out flew a fly. The samurai's sword flashed through the air and the fly fell to the ground, sliced in half. "Very impressive," said the judge. Now the judge came to the second samurai and again opened a small box. The samurai's sword flashed twice and the fly fell neatly cut into four parts. "Superb," exclaimed the judge! Finally it was the third samurai's turn. The Judge opened a third small box and a third fly buzzed out. The samurai's sword flashed through the air and the fly continued to buzz away. The third samurai put up his sword with a satisfied grin on his face. "But the fly still lives," observed the judge. "True," replied the samurai, "But he will never have children."