It seems to me that you guys have COMPLETELY missed the subtelty in Hitchen's comment. And that it was a reply in a greater context deriving from a distance-"duel" between him and certain others.
That is not meant serious, and never was, and as far as I know also was not answered in a blood-serious meaning by any of the mentioned ladies.
He was
extremely humorous and did not take any of what he said serious - just played the joke over two or three cushions. Compared to the dryness of his joking, the desert is a moist if not even wet place.
Just look at his face, and the very subtle mimic, especially that which is almost not there! Almost... I am sure he struggled hard not to laugh out loud and spoil it all.
Boy, his whole reasoning on why from a point of evolution women
do not even need to be funny, is a joke! The whole clip is! Must I poke a telephone pole into your eyes to raise your attention?
He is pulling your legs, and their legs - and you all fall for it!
Well, as I said: humour for the advanced.