As far as teenagers go - I think it's the parents responsibility to talk to their children about sex and what they expect from their children. It's not any organizations place to dictate this.
In this day, with not only STD's and pregnancy, but HIV (deadly of all), we need to talk to our children, tell them the facts and teach them how to protect themselves. It's not enough to just say don't do it. I have 3 children and it's impossible to watch them 24 hours a day. I have no desire to be with them 24 hours a day every day, every waking moment. I feel confident that I, as a parent have given them the facts and the tools (including condoms) to protect themselves.
When you say don't do it, or in my case told that sex is not fun, God (or Jehovah) only created it to "fill the earth, with people", then you have peers telling you that it "feels good" and "it is fun", that only makes the teenager more curious. I was told by my mother that if I sat next to a boy in a car I'd get pregnant!!! WTF???
Religion has no place in this matter expecially now, you have to be the one explaining this part of life to your children, and being honest, graphic and understanding.
IMHO
nj