It sounds like the reason some of the anti-abortion people don't want Sex-Ed taught in schools because they're worried about "morals".
I think Sex-Ed should be taught in schools in it's scientific form, and emphasising safety and birth control as well. It should NOT be up to the schools to teach kids "morals" about sex. THAT is up to the parents to teach, if they decide to do so. This is where I think that the line should be drawn.
Sex-Ed is in schools for the protection of the kids, so it's a good thing. "Morals" are not the school's business to teach, as everyone's morals are different.