What is the truth about sex and drugs? Is it really a professional teacher's job to do teach a child something that any other human being (like a parent) could teach a child?
The objective is to provide a basic and neutral formation so that every young citizen have a minimum level of knowledge on that subject. Parents, for many reason, can be unable to teach those things to their kids. It's not because the parents are dumb that we need to spread the dumbness for each generation.
It's not about teaching kids if sex is good or bad, it's about teaching them how it works. There's too much bullshit floating around with the religious crazies and the availability of porn, you need to teach minimal standards of having basic sex. It's not about "use a condom", it's about "HOW to use it". It's about giving them references or ressources on how to do some things without using porn as a standard. Improvisation comes when there's no guidelines and problems occur when there's improvisation usually.
If the teenager want to know how blowjobs work, or how anal sex work, why do we need to keep the secret? Either you explain them the basic guideline of how to do it, either they will go on google, look for it and find videos of girls choking on blowjobs or ass being rammed like it's jell-o.
Next there will be standardized testing on sex education.
If schools taught children how to critically think from their reading, writing, and math courses, then the students would be smart enough to know that there are directions on how to use a condom on the box it comes in. They would also know that they can go online and read advise from people like Dan Savage. Google is a great resource for knowing how to have sex. Wikipedia has an entry for every sex position there is and it is not laced with pornography, but actual information.
The problem with children is not having basic knowledge, it is that children cannot assess risk like adults are able to do. The way to develop ways to assess risk is to develop the skills needed to assess risk, such as critical thinking skills. Schools are already loaded with pointless crap that distracts students from learning things that will actually benefit them in the future. Many students that go to college must take remedial courses because the lack the basic logic and reasoning skills required to make a coherent sentence.
But writing is no big deal, they know how to use condoms and have anal sex. They can fuck like a god, who cares if they can't read the directions on how to put on a condom,
someone showed them how to.