I have no idea when i actually learned about/understood the concept of homosexuality, but i know that from a very young age, i knew some people were different. There was this guy i went to school with from kindergarten to grade 7 (then his family moved out west) and i knew in grade school that something about him was different. He just didn't act at all like the other guys - would only hang around with girls, etc. We stayed in touch after he moved and when he told me during in high school that he was gay, things clicked.