God created the mule, and told him , "You are mule. You will work constantly from dusk til dawn, carrying heavy loads on your back. You will eat grass and lack intelligence. You will live for 35 years. The mule answered, "To live like this for 35 years is too much. Please give me no more than 20". And it was so.
Then God created the dog, and told him, "You are dog. You will hold vigilance over the dwelling of man, to whom you will be his greatest companion. You will eat his table scraps and live for 30 years." The dog responded, "Lord, to live 30 years as a dog like that is to much. Please, no more than 10 years."
God then created the monkey and told him, "You are monkey. You shall swing from tree to tree, acting like an idiot. You will be funny and you shall live 20 years." The monkey responded, "God, to live 20 years as the clown of the world is too much. Please give me no more than 10 years..." and it was so.
Finally God created man and told him, "You are man, the only rational being that walks the earth. You will use your intelligence to have mastery over the creatures of the world. You will dominate the earth and live for 20 years." The man responded, "Lord, to be a man for only 20 years is too little. Please give me the 15 years the mule refused, the 20 years the dog refused and the 10 years rejected by the monkey."
And so God made man to live 20 years as a man, then marry and live 15 years like a mule working and carrying heavy loads on his back. Then, he is to have children and live 20 years as a dog, guarding his house and eating the leftovers after they empty the pantry. Then, in his old age, to live 10 years as a monkey, acting like an idiot to amuse his grandchildren.
And it is so...