There are two sets of kids:
Those who abstain from sex until marriage, and those that do not.
We already disagree here - there is one group – 10 year olds who do not have the maturity and cognitive skills to make a comprehensive decision on sexual activity. The assertion that group “B” is going to have sex anyway so what does it matter is flawed at so many levels – especially at the age group we are talking about.
Can you provide the study referenced above?
Let us consider the second group. What effect would teaching them about contraception have? It would make them better members of society because their behavior would be less risky.
Perpetuating “promiscuous” behavior is less risky and makes them better members of society? I am not sure I can make the connection there.
They would spread less disease, and get pregnant less often. We mandate drivers education for the exact same reason: it is important to reduce the risks associated with an activity that has the potential to harm others.
Which abstinence does as well, but with a higher success rate.
You would probably like to argue that it is possible to convince all kids to abstain until marriage, but even in the example of the successful abstinence program (which was not an “abstain-until-marriage” program), 1/3rd of the kids still became sexually active within 2 years. The program took place in the 7th grade and had to screen out kids who were already sexually active.
What the study you site also shows is that those who had a 12 hour comprehensive education program had the highest increase in sexual activity, and a higher percent of multiple partners. Interestingly enough, it showed that those who had the abstinence-only instruction were more responsible when they chose to have sex – with a higher percentage of condom use.