Following upon countless studies that have consistently found that the abstinence-only sex “education” championed by the Bush administration have been ineffectual or counterproductive, a new comprehensive federal study finds that students who pledge abstinence until marriage engage in dangerous sex practices at a higher rate than other students. Quelle surprise!

Teenagers who pledge to remain virgins until marriage are just as likely to have premarital sex as those who do not promise abstinence and are significantly less likely to use condoms and other forms of birth control when they do, according to a study released today.

The new analysis of data from a large federal survey found that more than half of youths became sexually active before marriage regardless of whether they had taken a “virginity pledge,” but that the percentage who took precautions against pregnancy or sexually transmitted diseases was 10 points lower for pledgers than for non-pledgers.

“Taking a pledge doesn’t seem to make any difference at all in any sexual behavior,” said Janet E. Rosenbaum of the Johns Hopkins Bloomberg School of Public Health, whose report appears in the January issue of the journal Pediatrics. “But it does seem to make a difference in condom use and other forms of birth control that is quite striking.”

Got that? The difference between teens who make abstinence “pledges” and teens who don’t isn’t sexual conduct, it’s that those who make the “pledges” engage in more dangerous sexual conduct.

After a while, this just gets repetitious — the right insists that abstinence programs work, objective research shows they don’t. Conservatives, not satisfied, demand more objective research, which further proves abstinence programs don’t work. No evidence, no matter how overwhelming, seems to be enough.

But reality just won’t budge. The nonpartisan National Campaign to Prevent Teen and Unplanned Pregnancy found that abstinence programs do not affect teenager sexual behavior. A congressionally-mandated study, which was not only comprehensive but also included long-term follow-up, found the exact same thing. Researchers keep conducting studies, and the results are always the same.