It was the law for that last ten years. North Carolina teachers were prohibited from teaching anything other than Abstinence Only.
Consequently, the pregnancy rate is up 12% and STD rates are "skyrocketing."
Quote by Jere Royall, an abstinence only education advocate: "They need to understand that sexuality is an important part of life but what they also need to understand is what the possible consequences are if they engage in sexual activity outside of marriage."
One might infer that marriage automatically protects you from STD's.