If you only give them the "no sex" option and no education, they are going to learn it from someone. Would parents rather have their kids learn it from each other? Worse, learn how it's "evil" from some fundamentalist that probably barely knows what it is to begin with? It's important to have a continuous all-inclusive, open discussion regardless of whether they choose to have sex or not.
Teen girls need to know how to take care of themselves with yearly gynecological visits, to catch Cervical, Ovarian, or other anomalies (cancer) early, as well as obtaining antibiotics/antivirals for STDs, condom use, signs of breast CA, etc. It's a health issue more than anything else, and teaching teens to be responsible IS responsible parenting.
I don't think one should invite a pastor in to control your kid's sex education. They should get the facts from the parents or the school or even a perspective on it, but I think it's a private thing. Trying to get facts from a biased source isn't a great idea....
