As much as parents or educators or whoever hope kids don't have premarital sex, fact of the matter is they do! We are sexual beings! Sex is one of the strongest driving forces in humans. I know there are some people that are not driven by sex for whatever reason (medication decreasing the libido, a painful past sexual experience, etc), but as long as humans have been in existence, sex is a very strong motive for their behavior.
So for those who think abstinence-only education must be the rule in schools, hopefully this study will help shed some light on our educators and politicians: kids need to know the facts, all the facts! Teens need to be given total insight to contraceptives available, the possible negative side effects of sexual behavior, and condoms need to be made available wherever possible for teens!