I think with 14 year olds getting pregnant, the idea of "lets hope our kids wait till they are married" is over, sadly. People are waiting till 25 years old to get married. Do we think our kids will wait till then? Sure, there are the small percentage that will. And bravo. I waited till I was 22. But I still wasnt married. Education is always, IMO, power. Just like the anti drug campaign "just Say No" was an epic fail, I believe in most cases, "Just dont have sex. Period" wont be super effective either.
Playing my own devil's advocate...but do I reallyyyy trust my local school district to teach my child what I want them to know about sex? Hmmmmm not really! It is my responsibility I think.