A Johns Hopkins Study of youth abstinence programs found no significant difference in sexual activity between matched participants and non-participants —
including the number of partners, incidence of sexually transmitted diseases or the age at which the teen lost his
or her virginity.
It also found that teens who had taken a virginity pledge were less likely to use condoms or other birth control.
Five years after taking an abstinence pledge, 82% of pledgers denied having ever made such a pledge.
