I gave this quite a lot of thought some time ago...
When I think about it logically, bisexual people are (in the main) the only people that can really claim to "care more about what is on the inside, than what is on the outside" without being hypocrites.
And while I am not one of those people who thinks that the physical is completely irrelevant and doesn't matter at all because it is only what is on the inside that counts when pursuing a sexual relationship that matter. I do think that WHO a person is as a person IS much more important than what they look like overall. Especially regarding anything long term.
However, if I wont even consider someone as an individual or care who they are as a person as a potential intimate partner simply because they don't possess a specific set of genitalia... then that does kind of make me a hypocrite. Doesn't it! Because in that case I DO care more about what is on the outside than what is on the inside.
Bear in mind... I believe everything I have written about fully and without doubt AND YET I am still hetrosexual regardless. As I really don't find men to be attractive at all despite my unique perspective on things. Although in my defense I have rarely really liked men's personalities in general very appealing which is why I only really ever had 4 male friends in my life but have had about 50 close female friends. So that could possibly explain it.
Regardless, I still kind of feel like a hypocrite for claiming "the inside is more important" and yet never actually ever considered any men as being potentially viable as an intimate pursuit in the slighest.
But logically, bisexuality has always made much more sense to me than any of the other options available because it is the individual that exists inside the physical that I have always fallen in love with... not the flesh itself.