A new study indicates that abstinence only sex education programs may not have the results their backers want, leading to some teens engaging in higher risk behaviours. Personally I found this statement from the linked article amusing:

'Leslee Unruh, president of the National Abstinence Clearinghouse in Sioux Falls, S.D., called the study "bogus," disputing that those involved had pledged true "abstinence."

"Kids who pledge abstinence are taught that any word that has 'sex' in it is considered a sexual activity," Unruh said. "Therefore oral sex is sex, and they are staying away."'

I think Ms. Unruh is rather naive if she believes that teens won't engage in semantic wordgames and other philosophical dodges to get their rocks off. "Its not really sex because you can't get pregnant" is sure to be the attitude of many towards things like oral and anal sex, and if you use an euphamism like blowjob the term sex won't even come into things.