Actually, most of them do... and it's kinda sad >.<Grilled Cheesus said:... Seriously?
Because all women comedians have the exact same skits huh?
Most of the ones I've seen either talk about female issues, how stupid/sexist/fat/<insert derogatory comment/quality> men are or similar subjects. I've heard one woman that had some nice material (someone on Escapist linked her performance actually), but that's about it, while I've seen a lot of male comedians that were hilarious and had loads of original and interesting material and abilities of comedic value.
As far as comedians go, sorry if you think it's sexist, but from my (granted limited) experience, yes, men are better. Also, again from my experience, men have more of a sense of humour and are less easily offended by well natured jokes.