It's a lot of fun to tell this one if you've been drinking, but it's not easy.

So there's this fly hovering 12 inches above the water.

And there's this fish whose looking at this fly, thinking "If that fly drops 6 inches, I can jump up and get that fly."

But there's this bear looking at this fish, whose looking at the fly, thinking, "If that fly drops 6 inches, that fish will get that fly and I can get that fish."

But there's this hunter looking at the bear whose looking at the fish whose looking at this fly, thinking "If that fly drops 6 inches the fish will get the fly, the bear will get the fish and I'll get that bear."

*Pause for a drink*

But there's this mouse whose looking at the hunter whose looking at the bear whose looking at the fish whose looking at the fly, thinking "If that fly drops 6 inches the fish will get the fly, the bear will get the fish the hunter will get the bear and I'll nab that hunters sandwich."

But there's this cat whose looking at the mouse whose looking at the hunter whose looking at the bear whose looking at the fish whose looking at the fly, thinking "If that fly drops 6 inches the fish will get the fly, the bear will get the fish the hunter will get the bear the mouse will get the sandwich and I'll get that mouse."

...

All of a sudden the fly drops six inches.
Fish jumps up, gets the fly.
Bear runs out, gets the fish.
Hunter shoots the bear, runs out to it.
Mouse goes for the sandwich.
And the cat pounces for the mouse, over shoots it's target and lands directly into the stream.

Do you know the moral of the story?

Every time a fly drops six inches a pussy gets wet.