I'm trying -really- hard to think of one that's not racist, sexist, insulting, derogatory, or all of the above. And I couldn't think of one, so I have to go with one that insults both sexes, so it's equal. Equality, people! Equality!
Adam was walking through the Garden of Eden, deep in thought, when he finally decided to just ask God. "God?" he said, looking up to the heavens.
"Yes, Adam?"
"Why did you make Eve?"
"Why, so you would a companion to talk to, to help take care of you and the Garden, of course."
"Okay. Alright, I can see that. But God, why did you make her so beautiful?"
"So that you would love her, protect her, and want to take care of her, Adam." God responds.
"Alright, I guess I can see that too. But God?"
"Yes, Adam?" God prompts.
"Why did you make her so f**king stupid?"
To which God instantly responds, "So SHE would love YOU."