Praying Back Your Hymen - The lauded absintence education efforts don't seem to be paying off. According to a new study virginity pledges by teenagers are kept by only 12% of pledgers. While such pledges may delay sexual activity, it certainly isn't stopping premarital relations from occurring. And furthermore, STD rates are the same for pledgers and non-pledgers, as pledgers are less likely to use contraception when they actually do Do It.