Why women get turned down?

I am just curious on how the ladies on this site are single. I mean it's more for researches purposes for later studies I'd like to conduct on relationships between people but I just am genuinely curious. Is it distance, location, hobbies, different animes, games, being in a small area with few nerds, etc etc that keep females searching for men on this site. I just see it as being a tougher challenge for a nerdy guy to find a nerdy girl to be with. Most guys want a nerdy girl and the ones that don't I suspect are the pretty boy types that feel they are the "shit" and don't wanna change anything about themselves/ want a specific type of chick. Well f anyone would care to expand on this topic or provide me with any info that'd be greatly appreciated :D

I suspect women get turned down for the basically the same reasons men get turned down. I don't think the two genders are all that different in that aspect :p

women on dating sites reject guys more because there are way less females and a higher pool of males to choose from. after a while all the males end up sounding pretty much alike (which is true, this is from personal experience)

I feel like at times both genders have one specific type of person they look for or basically have a high standard. (Which isn't a problem) But at times some people can be so blinded in that ideal type that they miss out or overlook people that are interested in them.

thats what dating sites are, a buffet of sorts. men on those sites dont really mind if women are into these sort of things, but if it was a guy it will usually be different. its not so apparent here because this site was made for people with such interests and the smaller userbase http://news.cnet.com/8301-17852_3-57551488-71/okcupid-experiment-proves-men-dont-mind-dating-sociopaths/ is a nice example of what i mean

That article makes me wish I wasn't apart of my own gender group even more v - v It's stuff like that which makes me too ashamed to even approach a girl :/ "What if this person has the mindset that I'm exactly like the majority of guys now a days?"

Gonna wear that "I'm a sensitive guy badge from the Sensitivity Gym in Saffron city." too tell the girls where you stand in life ;)