...and God said to Adam "I can create for you a partner that will do anything that you ask, never argue with you, be your best friend, boost your ego, satisfy you in every way, keep you content for every day of your life"
Adam thought about it and said "Sounds great, what will it cost me?"
The Lord replied "An arm and a leg"
Adam thought it over and asked "What can I get for just a rib?"
...and the rest is history!