First, to adopt BD is to reject our current taxonomy of sexual orientation. The assumptions that sexual orientation is always one-dimensional — concerning either sex-attraction or gender-attraction, but never a combination of the two — and that sexual orientation concerns the sex or gender of both potential partners are deeply embedded within the concepts associated with these categories. For this reason, the current concepts of “homosexual” and “heterosexual” do not pick out sexual orientations under BD. These terms inherently refer to a relation between the sexes (or genders) of sexual partners, whereas BD focuses exclusively on the sex and gender of the persons one is attracted to.
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