Here's that bad joke for you.

The Wide-Mouth Frog 

There was a wide-mouth frog that lived not too far from here. One day he 
decided to leave his pond and see the world.

He met a large, four-legged black and white animal with two horns, and 
said, "HELLO, I'M A WIDE-MOUTH FROG, WHAT ARE YOU, AND WHAT DO YOU EAT?"

"I'm a cow, and I eat grass"

"OH", said the wide-mouth frog, "IS THAT SO?"

The wide-mouthed frog then came to a huge bird with sharp talons and a 
curved beak. "HELLO, I'M A WIDE-MOUTH FROG, WHAT ARE YOU, AND WHAT DO YOU EAT?"

"I'm an eagle, and I eat little birds and mice"

"OH", said the wide-mouth frog, "IS THAT SO."

Next another large four-legged creature, standing on his hind legs, with 
sharp claws. "HELLO, I'M A WIDE-MOUTH FROG, WHAT ARE YOU, AND WHAT DO YOU EAT?"

"I'm a bear, and I eat honey"

"OH", said the wide-mouth frog, "IS THAT SO."

The wide-mouthed frog reached a river, and here was a long green slimy 
creature with huge jaws. "HELLO, I'M A WIDE-MOUTH FROG, WHAT ARE YOU, AND WHAT DO YOU EAT?"

"I'm an alligator and I eat wide-mouth frogs." 

"Oh", said the wide-mouth frog, "is that so."