Sex education in schools

What does everyone think sex ed should be like in schools? Personally I think it should actually educate, rather than aim to prevent sex from happening. Let's have people come out of sex ed with a good knowledge of sexual etiquette and the knowledge to please their partners. (Oh, this comes from someone whose school had abstinence only sex education in which it was taught that condoms with neither prevent disease nor pregnancy. I'm not making that up.)

In my humble opinion we should have sex education in public schools, but how about we try a "permission slip" type of plan? The more religious/prudent families can have there children remain ignorant while the rest get indoctrinated. This way both sides win, the liberal families can let the government raise there children and the conservatives’ sons and daughters become an easy fuck when they get into college.