When did you fall in love with a boy for the first time?

I'm interested to know what flicked your switch. It also seemed like something to talk about here, since almost every other sub is super sexual. I also just want to write out my own story as I don't have anyone to tell it to (I've told my mom I'm possibly trans, but she still doesn't know that I do like boys).

I used to have this colleague who was always genuinely very kind and had a really smooth and sexy voice. I didn't work in the same section as he did, though, so I could rarely listen to his voice. But at a party where we both were, he started talking to me because he recognized me from work. I don't remember what we talked about; I was so captured by his voice, probably. At the party, there was also karaoke. Apparently, he could sing as well. When he returned, I was totally enchanted. And I caught myself looking at the details of his face. He might have noticed this, as he looked back at my face. But that moment, checking out his light beard, still entranced by his singing, and then locking eyes with him as I looked up, that was probably the first time I consciously felt girly and also the first time I was so interested (matter of fact: first time in general as well) in a boy.