I know very little, myself; no one I know has identified themselves as asexual to me, and I can't recall reading anything written by someone who has. At least, until now; S. E. Smith has written a post briefly describing asexuality and the range of expression it can take.
One of the problems I encounter trying to write about intersectional issues in feminism is that I am a member of exactly zero minority groups. While this undoubtedly makes my life easier in a lot of respects -- no one's trying to evict me from my apartment, for instance -- it also means I lack a certain amount of perspective. As a result, first-person accounts from within a minority group are incredibly useful to me.
First-person accounts from within a group that is normally completely invisible are what I consider mandatory reading. I'm not even going to summarize Smith's post because you should go read it. And, ideally, the links within it. Doooo it.