Adam is looking sad and lonely, so God says
"I'll make you a mate. She'll be beautiful and lust after you constantly for sex.
She'll cook and clean and work full time and besides,she'll never nag you or mind when you go out drinking or golfing with your friends."

Adam smile happily and says, "That sounds great, what will it cost me?"

God says, "An arm and a leg!"

Adam says, "What can I get for a rib?"