LGBT are categories of love preference. (Transgendered can also be considered one). Asexuals are not attracted to men or women and therefore have no sexual preference so they do not apply to any of those categories. They don't fit in with Heterosexuality either because that is also a preference. Asexuality is the 'nothing' sexuality. I'm probably wrong but those are just my thoughts. Asexuals are not very expected to be found in places that involve sexuality such as LGBT categories. I also think that Asexuality is a fairly new thing and not many people have heard of it. I didn't know what it was at all until I started freaking out and discovering websites like this.