Is asexuality a real sexual orientation?

Well in medical school we learn there are two sexes male and female. So in the medical literature we identify people as either male or female

A persons sex is determined by following factors 1. appearance of their external anatomy 2. Chromosomes 3 internal sex organs 4. secondary sex characteristics 5. Way of dressing mannerism 6. Hormones Someone who is asexual does not experience sexual attraction. Asexual person can be straight, gay, bisexual or queer. Hope it helps.