Three ninjas are comparing their ability and boasting who is the best
The first says “Watch this” and does a chop in the air and a bee falls to the ground – chopped in half.
The second says “That’s nothing, watch this” Does a chop in the air and a fly falls to the ground – chopped in half.
The third also does a chop in the air towards a tiny gnat which then just flies off. The first two laugh and say that he didn’t chop it in half. “I know” the third ninja replies “…but he’ll never have children”