I was born in the early 90s and there was an AFAB person who very early on insisted they were actually a boy. I do remember thinking it was weird when I was a kid but the more they presented masculine the more it became "That's just the way they are" and I accepted it.

They were masculine presenting as early as 4th grade if I remember correctly. They were a beacon of light in high school for other queer people who hadn't figured themselves out yet. And they were super nice and friendly so everyone liked them.

They waited until our first year of college before asking us to refer them with he/him pronouns. It just made sense. I had a better understanding of gender and its spectrum by this point so it I remember thinking "finally."

Unfortunately he was in a car accident not too long after, and passed away. The world is sincerely lesser from his passing.