I don't know if they exist, but my own case is really weird: I like girls and I feel attracted by the body of females. I have had several girlfriends and I am in the middle of a relationship atm, a long one too (almost 6 years), and I'm in love with her. On the other side, I like cocks, sucking them, being slapped by them, getting my ass fucked, etc, but I don't especially feel attracted by dudes, I don't like their body and I don't think I could ever fall in love with a dude, reason by which I don't consider myself properly bisexual. And no, I wouldn't feel the same with a girl with a strap-on, it has to be a real cock. On top of all that, I get really horny when I wear feminine lingerie, panties, skirts, cleavages, etc, and I love the submissive / sissy / shy and helpless girl role, it makes me very aroused.
Sometimes I think that what would make me the happiest is to have a transsexual girlfriend, but I don't know really.
So, what am I? How would you define me? (Not that I care about it, to be honest, I know who I am, I accept myself and I'm happy about it, I'm just really curious about it).