Two sea monsters were swimming around in the ocean looking for something to do. They came up underneath a ship that was hauling potatoes.
Bob, the first sea monster, swam under the ship and tipped it over and ate everything on the ship.
A little while later they came upon another ship also hauling potatoes. Bob again capsized the ship and ate it all.
The third ship they found was also hauling potatoes, so once again Bob tipped it over and ate the entire thing.
Finally his buddy, Bill, asked him, “Why do you keep tipping over ships full of potatoes and eating everything on board?”
Bob replied ” I just can’t help myself once I start. Everyone knows that you can’t just eat one potato ship.”