Study finds teaching teens only the "wait-until-marriage" kind of sex ed doesn't work. It not only fails to delay the age when teens first have sex, but also fails to reduce unintended pregnancies and the spread of sexually transmitted infections.

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Study finds teaching teens only the "wait-until-marriage" kind of sex ed doesn't work. It not only fails to delay the age when teens first have sex, but also fails to reduce unintended pregnancies and the spread of sexually transmitted infections.