I'm glad that's simplistic approach works for you. It does not work for millions of people worldwide. People shouldn't be put in boxes anyway. Sex is sex, gender is a totally different story.Figure out who they are?
MTF......
1. Look between your legs, and figure it out.
2. Does the boy like dresses? Ok, then the BOY is more feminine than the other boys. But still a boy. Next year, he may see a nice set of nice tits on a woman and stop being feminine.