[Jack_]

To be fair, all sexualities (or rather, "sexual orientations") are no more or less tangible than any other. And there's a reason for that! The idea of having a "sexual orientation" is itself a discursive production, not an inherent truth (see: The History of Sexuality). A few hundred years ago sex was something one did, now it defines who you are.

"Homosexuality appeared as one of the forms of sexuality when it was transposed from the practice of sodomy onto a kind of interior androgyny, a hermaphrodism of the soul. The sodomite had been a temporary aberration; the homosexual was now a species"

That's not to say they aren't real, or are illegitimate, or that people choose who or what they're attracted to (this is really important), but it's worth remembering that literally all sexual orientations, are, in essence (and for want of a better phrase), "made up". So does it really matter?

Also, that's not to mention the fact that there are so many different facets to one's own sexuality, and yet we just use gender for definitional purposes. Eve Kosofsky Sedgwick's Epistemology of the Closet is well worth a read on this subject. Will change ya life, trust!

"It is a rather amazing fact that, of the very many dimensions along which the genital activity of one person can be differentiated from that of another (dimensions that include preference for certain acts, certain zones or sensations, certain physical types, a certain frequency, certain symbolic investments, certain relations of age or power, a certain species, a certain number of participants, etc. etc. etc.), precisely one, the gender of object choice, emerged from the turn of the century, and has remained, as the dimension denoted by the now ubiquitous category of "sexual orientation"."

"It is certainly true that without a concept of gender there could be, quite simply, no concept of homo- or heterosexuality. But many other dimensions of sexual choice (auto- or alloerotic, within or between generations, species, etc.) have no such distinctive, explicit definitional connection with gender; indeed, some dimensions of sexuality might be tied, not to gender, but instead to differences or similarities of race or class. The definitional narrowing-down in this century of sexuality as a whole to a binarized calculus of homo- or heterosexuality is a weighty fact but an entirely historical one."

TLDR: live and let live, none of it really matters