Is it possible to find out you're a lesbian at such a young age?

So today I went with my mom to help out with my youngest sister. I go into a separate room with her and the tatoo artist's 10 year old daughter. Her daughter notices my lesbian pride pin on my bag. "I need one of those!" She excitedly says. And then she points at it and then herself "me too!". She then proceeds to show me pictures of her "girl friend" (I doubt 10 year olds actually date). I don't mean to question her identity, but I find it rather curious since the realization only started hitting me when I was 15, and my lesbian inclinations didn't start becoming noticeable until I starting hitting puberty (unless if you count me being disgusted with romance because I disliked the idea of doing anything with boys or my weird fascination I had for my 6th grade teacher who was buff and couldn't stop talking about how she could throw me). However I do suppose I was influenced by religious beliefs I held at the time and she has a lot more access to queer media than I did at her age. Do people really find out that young?