It starts when we're really really small, and it pretty much doesn't stop until we die. Do what you're told, think what you're told. Don't question, it's dangerous to question. Give us a break. Of course we might get bloody well hurt.
Some people say that like it's a bad thing.
We'll get hurt a lot worse if we listen to them, and stay ignorant about what the real dangers are or what we could do if we tried. Our biggest real danger is thought control, the idea that ideas themselves are dangerous. We're taught to fear ideas, particularly if they don't instantly fit the things we already know. And that kind of control happens all the time. People do it to us who don't even know they're doing it.