on the 1st day God created a dog and said "Sit all day by your house,drool, and bark at anyone who comes in or walks past.Then,you will live 20 years."

The dog said: "That's a long time to be barking. How about only 10 years and I'll give you back the other 10?"

So God agreed.

On the 2nd day, God created a monkey and said: "Entertain people, do tricks, and make them laugh. Then, you will live 20-years ."

The monkey said: "Monkey tricks for 20 years? That's a pretty long time to perform. what if I give you back 10 like the dog did?"

And God agreed.

On the 3rd day, God created a cow and said: "You must go into the field with the farmer all day long and suffer under the sun, have calves and give milk to support the farmer's family. Then, you will live for 60 years."
The cow said: "That's kind of a tough life you want me to live for 60 years. How about 20 and I'll give back the other 40?"
And God agreed agai