Old joke: 3 Samurai held a contest to see who was the best. The first Samurai walks into the arena. On a table is a small box, which he opens. A fly zips out and--SWISH!--he draws his sword and cuts the fly in two.
The second Samurai walks in, opens a new box and--SWISH! SWISH!--the fly falls in 4 pieces.
The third Samurai walks in. SWISH!--the fly flies away.
"You did not kill the fly!" The judges say.
"True," the swordsman replies, "but he will never have children again."