Two sharks

Two great white sharks, swimming in the ocean, spied survivors of a sunken ship.
> "Follow me, son." the father shark said to the son shark and they swam
> to the mass of people.
> "First we swim around them a few times with just the tip of our fins
> showing." And they did.
> "Well done, son! Now we swim around them a few times with all of our
> fins showing." And they did.
> "Now we eat everybody." And they did.
> When they were both gorged, the son asked,
> "Dad, why didn't we just eat them all at first? Why did we swim
> around and around them?"
> His wise father replied, "Because they taste better without the shit inside!"