Are women funny? Do they need to be?

I believe it was last year that Vanity Fair writer Christopher Hitchens wrote the article "Why Women Aren't Funny". The point of the article was not to suggest that there are zero hilarious women. Hitchens does not deny that women like Tina Fey and Amy Poehler are funny. The point of the article is to look at humor as a tool of survival for the human male.
Ask any woman what she looks for in a man and she is sure to say "a good sense of humor" somehwhere in her description of the ideal mate. Most men need a good sense of humor to attract a woman. Unless a man is as good looking as say a George Clooney or a Paul Walker, he will have to have other attributes that will help him get a girl, which will help him get laid, which will allow him to pass on his genes to a new generation.
Men are incredibly simple, at least we all believe we are when compared to the painful complexity as we see it of the human female. The truth is, which Hitchens also makes in the article, is that women dont have to try to be funny around us. We'll sleep with you anyway.
Because it essential for most men to have a good sense of humor, and has been ever since mankind has existed, men are more naturally funny than women. We have to be funny to survive. Women just have to give us a quick smile and a wink of the eye and we are hooked.
So no, I do not agree with Jerry Lewis that there are no funny female comics. Of course there are. But I believe that the reason we see more male comics than female is because men have had to work for thousands of years at being funny so that they have some chance at reproducing. Because this is not the same for women, I would say that the male sense of humor is more well developed than that of females.
We like comedy because it makes us laugh, which in turn puts us in a better mood. What Hitchens article made me notice is that though we all like a good laugh, few of us think of its significance in continuing the survival of the human race