Once you realize that The Exorcist is, essentially, the story of a 12-year-old who starts cussing, masturbating, and disobeying her mother — in other words, going through puberty — it becomes apparent to the feminist-minded viewer why two adult men are called in to slap her around for much of the third act.
People are convinced that something spooky is going on with girls ; that, once they reach a certain age, they lose their adorable innocence and start tapping into something powerful and forbidden. Little girls are sugar and spice, but women are just plain scary. And the moment a girl becomes a woman is the moment you fear her most.
— words by Sady
source