BL Stuff. When and how?

How and when did you guys discovered you are into guy x guy stuff?
For me it was summer holiday before first year of high school, I was watching TV, then move "No night is too long" started and when I saw two guys kissing I was like "Damn, I like it, I want to see more..." It made me feel really excited.
But I didn't start to read/watch yaoi until year ago.