Klumpen0815: That's due to the fact, that current western culture still sees women as "the beautiful/sexy gender", that's why today way more women than men are bisexual or homosexual, just like in the upper class of ancient greece only with the genders exchanged. As I've said: It's a cultural (and not genetical) thing. Vampire: Bloodlines is something from our times, so you shouldn't wonder.
Telika: Uh, I don't really think there are more homosexual women.
It's just that their statuses are different, and homophobia towards males and females express themselves very differently. Their public reprentations, mainly in the medias, are different. Lesbians are "accepted" as far as they stay a commodity for males (threesomes, etc), that is : not lesbian. While a male homosexual couple will be refused existence directly ("how dare you hold hands in a public space, and impose us your sight"), female homosexual couples will be merely refused their exclusivity. In practice, they will be treated as sluts, as easy women, open for male flirting, and, generally speaking, as "not in a couple" (while a male/female couple will be treated as "closed"). And they will be displayed in fictions as fuel for male fantasies. They only get the same hostility and "invisibility treatment" as male homosexuals only when they are to openly, blantantly, and unambiguously "not for males".
Basically, females have more work to do in order to prove that they are not the assumed "bisexuals only waiting for your mighty manhood", and their rights to be simple homosexuals is denied just as strongly -if not even more- than male's once they have established that they are simply not available to men.
I think that, while there are roughly as many males and females homosexuals, you will "see" more lesbians in fictions, and less "in the real world", because of this specific kind of image and conditional visibility they have.
I'll agree to this for the most part; lesbians have always been more 'acceptable' than male gay relationships because they are unfairly used as fantasy fuel and their relationships aren't taken seriously by some morons. In the late 1800's the term was 'special friendship' or a 'Boston marriage'. I mean, they can and do get the same harrassment as males at times - I've heard of lesbians being gay bashed - but I feel for them because whilst being gay men is shunned with homophobes, some particular male inbreds are perfectly fine with lesbains because they think they can 'get in' on that. Hence this leads to objectification, and thus more media portrayl; gay men in media are the floppy handed effeminate hairdressers, whilst women are the constantly sexual scantily clad BDSM whip wielding domanaitixes secretly longing for a man. I think the last lesbian couple in games done right without making them look like strippers teasing a male protagonist was in Dreamfall, actually; the landlady and her gf. And that's really a shame, because that game is over a decade old.