A recent Rand Study concluded that drug education for adolescents can have long term impacts on sexual behavior. From Denise Witmer at About.com:Teens:
Researchers found that young adults who had been exposed to a popular drug abuse prevention program as adolescents were less likely to engage in risky sexual behavior five to seven years later, according to the findings published online by the Journal of Adolescent Health. The study provides the strongest evidence to date that drug abuse prevention programs can also curb risky sexual practices in young adulthood.
