Abstinence should be taught as an option in sex-ed. Using it will prevent a lot of life hassle.
As well, the more dramatic effects of sexual consequences should be made known. For example, boys will brag about their scores with the easier girls — and reputations are developed.
In the end, handing down more knowledge and second-hand experience will help some teens make better choices — and maybe we have due diligence to pass these “stories” on. But we should not expect 100% compliance.