Seems God was just about done with creating the universe but he had two extra things left over in his bag so he decided to split them between Adam and Eve.
He told them that one of the things he had left was a thing that would allow the owner to pee while standing up. "It's a very handy thing," God told them, "and I was wondering if either one of you would like that."
When Adam saw it, he jumped up and down and begged "Oh, give that to me! I'd love to have that. It seems just the sort of thing a man should be have. Please. Please! Pleeease! Give it to me." On and on he went like an excited little boy.
So Eve just smiled and told God that if Adam really wanted it so badly, he should have it. So God gave Adam the thing that allowed him to pee while standing up and he was so excited. He whizzed on the bark of a tree and then went off to write his name in the sand, laughing with delight all the while.
God and Eve watched him for a moment and then God said to Eve, "Well, here's the other thing and I guess you can have it."
"What's it called? Eve asked.
"Brains" God said.