Hello Harvey, and welcome to this friendly meeting place where we recognise--like you do as a freethinking atheist--that all the gods are phoney and religions are cunning frauds used to control people;
and how tragic and inexcusable it is that women and minorities have been oppressed these last two thousand years and more.
Well, you've got men who truly aren't attracted to women, and you have people who truly don't like chocolate, so why is it hard to believe that a person could be asexual? Nothing wrong with any of those things, they're just the exception to the norm.
That said, I don't think I'm truly asexual, I'm just not interested in a relationship now.