Excellent choice of topics, Mr. Wally!
Sexually it s a bizarre thing, to say the least. People say one thing, and attempt to stand firm by said resolution, but I think there might always be a subconscious voice saying otherwise. I mean, there's been several stiff-neck American politicians, denouncing homosexual and le homosexuals with every ounce of their heart, only to be caught in an unsavoury (for them, anyway) situation with one.
As these guys above have said, it probably is more of an individual thing. You /love/ someone for who they are inside, mind and soul, not for their body. Unfortunately, some of the less worldly among us limit their options based on conscious efforts, rather than allowing what might happen to happen. One can't really blame them though, as: "self-determination".
See? Strangeness all around; quite a delicate thing. To answer your question though: throw away such restrictive terms, mortal! You are human, and you're attracted to humans, and you will love what you love regardless of what's between their legs.
Or maybe that's just me. Though I think I prefer guys, if I fall for a girl--or even something in between--meh. Though, "fall for" has to mean more than "have a superficial attraction for", which is where things get hazy again... Haha.