Seems like it would fall under the same heading. Attraction to male sexual characteristics, female sexual characteristics, either, both, nothing, or neither?
I am not saying it fits, but the edge cases in biology get really strange and eventually you need new terms for clarity. Chimera for example can contain one set of male cells and one set of female cells. So you start off with clear separation XX, XY then notice an outlier XXY etc, and suddenly need a new notation XX:XY.