I do believe that at last some of the people who claim asexuality are asexual. The reason being? I'm asexual myself. Yeah, yeah, I know, but I have legitimately never been attracted to another person of either gender in my entire life. Now, I'm only 23 (just turned 23, in fact), so, obviously, I could find someone who turns me on/I am attracted to for resons of the person and not the form. Chances of this are slim as I, as I said, do not find people to be attractive (in any form). Rather, I do not find the human form (or humans themselves (personalities and such)) to be attractive. I have no sex drive. At all. I can't even look at a person and decide whether or not they are attractive. Anything above "Passable/Average" looks pretty much the same to me. Hell, I only have a perception of "Ugly" because of cultural upbringing, so I don't tend to call things/people ugly because I can't tell if they are or not, just I don't call things/people pretty or other such things because, like I said, I can't tell.
And yes, people have suggested that I just have a weird kink. I have looked at pretty much every common and most of the uncommon kinks. They do nothing for me. I just, I don't know, don't give a shit about sex, sexual relations, sexual things, etc. I also don;t care much about interpersonal relationships in general, so that probably hurts my cause a bit. I do believe part of this is due to my near misanthropic nature (I'm only social because I need to be to make a living), so it is entirely possible that my hate for humanity* is just so powerful that it is outweighing any naural tendencies I have towards sexual attraction, Unlikely, but entirely possible.
*I am aware that I am part of humanity, and would therefore need to be factored in. Well, let's just say I'm not to fond of myself, either.
P.S: I am also aware of how much this makes me sound like a crazy. Not the aseuxal part. The hating people part. I'm actually not that bad. It's just that, when it comes to this, I tend to be fairly... blunt, I guess is the right term. I'm more gentle, respectful in most other topics. That also leads directly into the following; I if somehow offended anyone, I did not mean to, and so apologize.