Is a women's sexuality more fluid than men's?

[wll32]

If it is true, then why is that? What makes more women attracted to their own body parts then men? Is it Narcissism? I don't understand either one, but I have heard women are more proned to it? Whether it is attraction, arousal or fantasies, why is there more women into this?
I realize most people are indifferent to the same-sex and aren't fascinated, its just strange that one gender is more bisexual then the other. From a evolutional or intelligent design stance it doesn't make sense. Then again maybe its just media or cultural.
I'm pretty sure most people are not bisexual at all, but I'm wondering why there are more women that are, or at least admit to some sort of attraction. From a straight guy's point of view, none of it makes any sense to me. I don't really know how anyone can find the same-sex sexually attractive. I thought most people where attracted to what they don't have, and not at all attracted to the same anatomy. No offense, its just something I was wondering.
I asked this question here because there seems to be a balance of straight and bisexual women. Also it seems like a lot of guys on here think most women are bisexual. From a sexual attraction point it doesn't make sense.
Nataly L: What about straight women who aren't attracted to women's bodies though?

 

[NatalyL]

If you look in the media you will see women's body's are more sexualized than men's. For example go to a p0rn site and you will see how the videos make women the main sexual objects compared to men. (blondes, redhead, big boobs, latina, asian, etc... all women)

So growing up we see that women are the sexual objects and look at their body sexually more so than mens.