Desire's excursive mobility is always filtered in Dracula through the mask of a monstrous or demonic heterosexuality. . . . This is. . . Vampires, being not truly human, cannot truly be male or female in a sense. Though their anatomy remains the same as the human's they once were, their being changes. This is alluded to above in the discussion of the sexually aggressive female.
All vampires penetrate via their bite.
This dynamic is turned on its head in vampirism, and you essentially have a being capable of penetrating and experiencing any other being. Therefore, you have many phallic creatures penetrating both male and female humans, creating a visually bierotic image. In Our Vampires, Ourselves, Nina Auerbach relates the story of a transsexual, Sandy Stone, she met at a conference of Queer Theorists. Vampires are similar in that they have not fully exchanged human for inhuman. Evidence of both identities exists.