>>1Genetics: You are either XX or XY. This determines how your brain and body develops.
Biology: Your gonads are either Ovaries or Testes. This determines which reproductive cells you produce.
Secondary Sex characteristics: You have a Penis or you have a Vagina.
Sexual Identity: You Identify as either Male of Female
Sexual Preference: You like other Males or other Females
Just imagine how things turn out for people who end up with a disorder
(like androgen insensitivity syndrome (AIS)) in one or more of these categories!
https://jenapincott.wordpress.com/2009/06/01/when-the-perfect-woman-is-genetically-male/