Adam told god he was lonely, so god said I will create a perfect companion for you who will always look after you, do all the house work, cook all the food, carry your children, look after you when you are sick, love and cherish you always. When you have an argument your companion will always be the first to say sorry because you were right.
That sounds to good to be true said Adam, how much will this cost me god.
And god said an arm and a leg.
so Adam said what can I get for a rib?
And the rest is History.