Teens don't stick to abstinence pledges, finds study

... In what undermines the power of 'virginity pledges', a survey has found that many teenagers sign such a pledge and then go on to have premarital sex, denying that they ever undertook the vow to remain virginal till marriage. In addition, many who have already indulged in sexual intercourse and then signed such a pledge report their sexual history falsely, making it difficult to accurately gauge how well they keep the pledge. ...