What evidence have you that sex with children results in psychological harm?
I made it quite clear I was talking about consensual sex.
Do laws not need to be justified? Is it acceptable for actions to be criminalized for no reason? Perhaps we should criminalize being gay or black people going to the same schools as whites.
Of course, we decide many things for them. What they eat, what religion they have, when they go to bed - why not decide how they learn about sex?
Not true.
Sex should only be criminalized if it results in harm.
Do you realize that in Germany, Austria, Switzerland, Spain the drinking age is 16? Of course these nations have far fewer alcohol related problems than the USA. When people are made responsible for there actions they behave responsibly, when (as in the USA) you treat people like babies until they are 21 they behave like babies. Kids will drink alcohol whether you want them to or not - the only choice society has is if they drink in a bar or on the streets (where they are more likely to commit or be victims of crime).
America is certainly not a good example - your teenagers impregnate each other (because they are under 18 and legally considered asexual babies who mustn't be educated about sex), your war on drugs is counter productive, and you are generally obnoxious.