Life explaination

When God created the dog, he said: "Sit all day by the door of your house and bark. I will give you a lifespan of 20 years"

The dog said:"That's too long to be barking. I'll give you back 10 years."

When God created the monkey, he said: "Entertain people, make them laugh. I'll give you 20 year lifespan."

The monkey said:"How boring, monkey tricks for 20 years. I'll give you back 10 years too."

When God created the cow, he said: "You work the field with the farmer, have calves and give milk, I will give you a lifespan of 60 years"

The cow said:"That's a tough life. Let me have 20 and I'll give you back the other 40."

When God created the man, he said: "Eat, sleep, play, marry and enjoy life and I will give you a 20 years"

The man said:"What ? Only 20 years! I'll take my 20 and the 40 the cow gave plus the 10 the monkey and the dog give. That makes 80"

That is why the first 20 years we eat, sleep, play and enjoy ourselves. For the next 40 years, we slave in the sun to support our family; the next 10 years we do monkey trick to entertain the grandchildren, and for the last 10 year we sit on the front porch and bark at everyone