Glitched
The reason you know you are female is because the minute you are born you were told so.
Who's mummy's gorgeous girl. There's a good girl.
As soon as you became sentient you would have noticed the physical difference between you and a boy.
You would have grown up, knowing, beyond doubt, you are a girl/female because you ARE one.
Your body and the way people treat you because of your body would be obvious.
It's not a feeling.
I can easily imagine a boy growing up, identifying with girls, wanting to be like girls. Because he sees what they play with, how they are treated, what they are praised for. And he wants that for himself.
He enjoys sparkles and glitter and wants to be affirmed in his choice.
It's entirely understandable, and completely natural.
It doesn't make him a girl. It makes him a boy who likes the trappings that girls get.
And he should absolutely have them.
Those things are gender. Gender is shit. It stops some boys getting what they want.
They have to say they are girls, to get it.
Again it's not difficult to understand. We get it.
What we are saying is stop gendering STUFF.
Let it become accessible to all.
Because, claiming you are a girl in order to access that stuff, actually dismisses and minimises what, in reality, away from all the good stuff, happens to girls based on their biology, not their preferences.
Please try and understand. Feminists want to eliminate gender in order that men can have what they want. And women, also, can have what they want.