I remember my daughter, in a long term, now committed gay relationship calling me late one night saying "Mom, .....(story in which she went home with a guy she knew well)...I thought I was Just Gay, "What if I am Bi?" and I thought, and said well, "It gives you so much choice.".....Of course it is a sexual identity. Which, frankly, being hopelessly heterosexual, I envy in many ways .... I wonder, at times, if it isn't something many of us are "capable" of but fear....more than being gay...or even transgender...
Perhaps the fear causes rejection...abhorrence, intolerance...
I remember wondering why this bothered her so, when all else was okay.