I went through sex education twice, once in elementary school, and once in 11th grade. The first one was courtesy of the Colorado public school system (where I would have had the dubious honor of going to Columbine high school, if I had stayed that long). It was very scientific and dry, and I got the impression that our teacher was very uncomfortable having to explain the birds and the bees to a buch of elementary-school students. Most of us had only a vague idea of what sex was and how the mechanics of the dirty deed worked, but had never given much serious consideration to doing it ourselves.

The second time was in 11th grade, perpetrated by the Texas public schools (apparently a subsidiary of the southern baptist church). The entire lesson was "DON'T HAVE SEX". Because if you do, it'll turn green and fall off. I learned more in elementary school.