On the first day God created the cow. God said,
"You will go into the field with the farmer and
suffer under the hot sun, have calves and give
milk to support the farmer and for this I will
give you a life span of sixty years."
The cow said, "That's sort of a tough life you
want me to live for sixty years. Let me have
twenty years and you can have the other forty back."
God agreed.
On the second day, God created the dog. God said,
"You'll sit all day by the door of your house and
bark at anyone who comes in or walks past. I'll
give you a life span of twenty years."
The dog thought then said, "That's too long to be barking.
Give me ten years and I'll give back the other ten."
So God agreed.
On the third day God created the monkey. God
said, "You'll entertain people, do monkey tricks,
and make everyone laugh. I'll give you a life
span of twenty years."
The monkey said, "How boring, monkey tricks for
twenty years? I don't think so. The Dog gave you
back ten, so that's what I'll do also, okay?"
And God agreed again.
On the fourth day God created man. God said,
"You'll eat, sleep, play, have sex, and enjoy
life. Your life span will be twenty years." Man
thought and said, "What? Only twenty years? No
way. Tell you what, I'll take my twenty, plus the
forty the cow returned, and the ten the dog gave
back and the ten the monkey gave back. That
totals eighty years, okay?"
"Okay," said God, "you've got a deal."
So that's why for the first twenty years we eat,
sleep, play, have sex, and enjoy life; for the
next forty years we slave in the hot sun to
support our family; for the next ten years we do
monkey tricks to entertain our grandchildren; and
for the last ten years we sit in front of the
house and bark at everybody.