On the fourth day, God created man and said: "Eat, sleep, play, marry and enjoy your life. For this, I'll give you 20 years."
But man said: "Only 20 years? Could you possibly give me my 20, the 40 the cow gave back, the 10 the monkey gave back, and the 10 the dog gave back?"
"Okay," said God, "You asked for it."
So that is why for our first 20 years we eat, sleep, play and enjoy ourselves.
For the next 40 years we slave in the sun to support our family.
For the next 10 years we do tricks to entertain the grandchildren.
And for the last 10 years we sit on the front porch,drool, and bark at everyone.