I really fail to unsderstand why this keeps being a discussion about abstinence only. The OP was not about abstinence only and virtually no one in this country is advocating abstinence only.
Interestingly enough I found a planned parenthood site discussing this toipic. Almost all of the references go back to 2000 or older. One of them refers to inaccuracies taught about contraceptives in an abstinence only course. Wait!! If an abstinecne only course is teaching about contraceptives then it is not really an abstinence only course is it?
No, it isn't.
Abstinence is to be applauded, to be promoted, to be the best way for teens to avoid pregnancy and other negative results of sexual activity. Unfortunately, they aren't all going to be abstinent, so it is best that they understand the risks and how to minimize them.
They have 24/7 TV programs telling them that jumping from bed to bed is normal behavior, after all.