Adam was walking around the Garden of Eden feeling very lonely, so God asked Adam, "What is wrong with you?" Adam said he didn't have anyone to talk to. God said he was going to give him a companion and it would be a woman. He said, "This person will cook for you and wash your clothes, she will always agree with every decision you make. She will bear you children and never ask you to get up in the middle of the night to takecare of them. She will not nag you, and will always be the first to admit she was wrong when you've had a disagreement. She will never have a headache, and will freely give you love and compassion whenever needed".
Adam asked God, "What will a woman like this cost?"
God said, "An arm and a leg."
To which Adam replied, "What can I get for just a rib?"
The rest is history.