If there's one trick that terrible sex-ed programs rely on to scare teens out of boning, it's the idea that only abstinence can keep you safe from spiritual ruin and disease. But a new study published in The Journal of Infectious Disease seems to undercut even the basic premise of that scare tactic: Being a virgin doesn't necessarily protect you from catching common sexually transmitted infections like the human papillomavirus (HPV), which can cause genital warts and cancer.