At what age is a person aware of their sexuality

Yeah, I am aware of the David Reimer case. And I am aware that Transvestites are often (but not necessarily) heterosexuals who enjoy dressing in women’s clothes. I’m not sure whether there are female transvestites. Now I learn that one’s Gender Identity does not mean you will necessarily be sexually attracted to the sex opposite of your sense of gender identity. They could eventually be gay, lesbian, heterosexual or bisexual. Then we also have persons who change gender. (I presume that transgender persons had a gender identity issue that motivated their gender change. But I’m sure I could be wrong about that. Maybe some have different motivations for gender change.) Then, the transgender person can also be either gay, lesbian, heterosexual, or bisexual with regard to their original or eventual gender. Then we also have your more mundane homosexuals, bisexuals, and heterosexuals. Taken all together these gender/sexuality issues are surprisingly complex.