The thing about age is this: If you are 40, you have been 20. If you are 20, you have never been 40. (Substitute any number that works for you when comparing you to your parents, teachers, elected officials, policemen, or anyone else you want to hate 'cause they tell you what to do.)
The fact remains: No matter how much it pains you to admit it, those who are older and who share your general intelligence level and who live in approximately the same world you do (such as America), will know pretty much what's going on in your mind. They are, for the most part, actually trying to help you benefit from what they've learned. You don't give a shit now, but when you turn into them you may refer back to this node for an I told you so moment.