On the first day, God created the cow. God said, “You must go to the
field with the farmer all day long, and suffer under the sun, have
calves and give milk to support the farmer. I will give you a life
span of 60 years.”

The cow said, “That’s kind of a rough life you want me to live for 60
years. Let me have 20, and I’ll give back the other 40.”

And God agreed.

On the second day, God created the dog. God said, “Sit all day by the
door of your house and bark at anyone who comes in or walks past. I will
give you a life span of 20 years.”

The dog said, “That’s too long to be barking. Give me 10 years and
I’ll give you back the other 10.”

So God agreed. (sigh)

On the third day, God created the monkey. God said, “Entertain
people, do tricks, make them laugh. I’ll give you a 20 year life
span.”

The monkey said, “How boring, monkey tricks for 20 years? I don’t
think so. Dog gave you back 10, so that’s what I’ll do too, OK?”

And God agreed again.

On the fourth day, God created man. God said, “Eat, sleep, play, have
fun, enjoy. Do nothing, just enjoy, enjoy. I’ll give you 20 years.”

Man said, “What? Only 20 years! No way, man. Tell you what, I’ll
take my 20, and the 40 the cow gave back, and the 10 the dog gave back,
and the 10 the monkey gave back. That makes 80, OK?”

“OK,” said God, “You’ve got a deal”.

So that is why the first 20 years, we eat, sleep, play, have fun, enjoy,
and do nothing; for the next 40 years, we slave in the sun to support
our family; for the next 10 years, we do monkey tricks to entertain
grand children; and then for the last 10 years, we sit on the front
porch and bark at everyone.

Life has just been explained!