Having worked for Planned Parenthood specifically in the teen sexual education department, I know how important it is for kids and teens to be educated about puberty, sex, sti's and prevention, and birth control. The vast majority of parents do not teach their kids about any of these thing. In fact, most of them lie or inadvertently misinform their kids, because of their own lack of knowledge.
I've given talks to kids, teens, and "adults" within safe houses, schools, churches, juvenile halls, jail houses, and even college campuses. The knowledge gap concerning sti's and birth control between teens, college students, and even adults is much smaller then one might think! Teens, adults, and college students are all equally misinformed! The reason behind this, I'm determining from my experience, is that the sexual education these people had in school wasn't adequate or just completely false! Christian sex ed. groups and purity ring groups seem to be the favored choice for educating students on sex. However, all those groups teach is to not have sex at all, because it is immoral and dangerous!
The reality is that most teenagers have already had some form of sex by the time these sex ed groups come along. So telling kids that they're bad people for having sex before marriage and that they may die from having sex doesn't do any good whatsoever. From my experience, teenagers have a lot of burning questions about sex and their bodies, such as how to put on a condom, what sores are normal vs. an infection on one's genitals, is it safe to have sex while a girl is on her period, what protection should I be using, I've had unprotected sex x-amount of time ago, what should I do? Boys and men have asked me these questions and tons and tons more.
One of my favorite presentations was when my group went to a college campus and talked to 100+ students in a lecture hall. My job was to talk about sti parasites. When I started talking about Trichomoniasis, and how it is a living parasite crawling around inside your genitals, the students cringed and laughed. I ended with "The longer you wait to go to the pharmacy to get the cream or to go to the doctor for your shot, the more these parasites feast on your body! So why even worry about any awkwardness at the pharmacy or talking to your doctor?!"
To sum it up, what was my job? To clean up the mess and educate kids who were misinformed by failed talks and plastic rings from Christian sex ed groups.