By the time you're 30, you'll be hit with the crushing truth of just how much the grownups didn't teach you when you were in school. And, while liberals and conservatives haggle over whether public schools need more funding or more lessons on the Ten Commandments, we think all can agree there are some very basic, useful things that our children really, really should know.

10 Sex Ed (for Girls): How to Spot a Douchebag

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Young ladies, you're in your teens now and already you have no doubt run into some guys who are being suspiciously nice to you. Likely you have figured out that in many cases, this has nothing to do with them being nice guys and everything to do with them desperately wanting you to touch their boner.

What you may not realize is that over the next few years, a string of rejections will cause many of these men to start hating you. Some of them hate you already, because they grew up hating their mothers and it kind of carries over. Boys are like that.

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Now, some of these men will then become members of the Pick Up Artist Community, also known as the Seduction Community. This is a loose club of guys who see females as a collection of walking masturbation aids. They have websites and seminars and chat rooms where they trade tips on how to manipulate you into having sex with them.

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They believe the male/female relationship is adversarial in nature, and that sex is a way of conquering you. Thus many of their techniques work by playing on your insecurities, like "the Neg," where they first engage you in conversation, then drop subtle criticisms that will undermine your self-esteem and subconsciously make you want to gain their approval (by letting them touch your boobs). Believe it or not, it works--if you're not ready for it.