There's an interesting debate at slate about whether Sara O Holla's tumblr "MyHusband's Stupid Record Collection" is inadvertently sexist because it confirms the stereotype of only men being music nerds.*
In our culture we do tend to associate men with the nerdly characteristic of getting overly enthusiastic about some narrow area and then trying to become frighteningly completist with respect to it. If we didn't have that association we wouldn't have the locution "nerd girl" (for more info, see the funny tumblr "Nerd Girl Problems") If you just call a guy a nerd you don't have to say "nerd boy."
I think that these stereotypes might have a little bit to do with why women are underrepresetned in philosophy. There's not much difference between a music nerd reclassifying his sixteen boxes of LPs and someone organizing the dialectical space around everything anyone has ever said about Fitch's Paradox.
