Public schools, when they teach about human sexuality discuss the biological mechanics of reproduction. If that were all, it wouldn't be such a bad thing. I admit, they are better at explaining the science than I. However, the schools do not stop there.
Next, they try to explain inappropriate touching. They say, "Don't do this", and "Don't do that", and "Tell an adult if someone touches you in a way that makes you uncomfortable". It's a noble effort, but when you tell a child not to do something, more often than not, all you've succeeded at doing is giving that child a bad idea. Also, when it's an adult doing the "touching" most children don't know which adults they can trust or discuss it with.
More often than not, a discussion on birth control and STD's comes up after the "Don't touch" talk. In effect, they are saying a child can engage in sexual activity without physical or emotional consequences as long as they use the condom and/or pill. If that fails, then (for girls) "here is the address and phone number of a women's 'reproductive health' clinic where-in you can receive services without notifying a parent"; and (for guys) "if you get a STD that's just too bad, make sure you tell your next sex partner... oh, and never mind if your sex partner becomes pregnant" (I'm not sure if that's changed in recent years, but when I was in high school, that's where they left it with the guys).
Somewhere in the process a discussion of gender orientation comes up, but only in a "non-judgemental" way so that no one's feelings get hurt, and to reassure youngsters that if they are not attracted to anyone of the opposite sex, or attracted to both sexes, or have an unusual sexual fetish, then it is "normal" and "natural" they will never EVER change.
Most of the above is information is important and most of it should be taught (although I might leave out the fatalistic gender orientation part).
What is lacking is context (see Things We Should Tell Children About Sex). Sex is wonderful and important, but it has its place. Most of my generation has no idea what sex even means. We were told to just do whatever "feels right", without regards for truth or consequences. The President of the United States when we were in our youth spoke this pearl of wisdom before the Grand Jury to carried throughout the ages:
|lifted from this website|
Yeah, right. And the older generation wonders why the my generation is confused about sex.