A change of pace for faith-based sex education

If you're a teenager, Bob and Dannah Gresh want you to have great sex - just not yet.

The charismatic couple are founders of Pure Freedom, a faith-based organization that travels the country promoting a radical new form of sex education.

Shattering traditional faith-based approaches to sex ed, Pure Freedom is a fusion of social science and biblical text. Mr. and Mrs. Gresh are just as likely to quote a statistic from the Centers for Disease Control as they are a passage from the apostle Paul's letters to the early Christians.

Their presentation might include dumping a bucket of ping-pong balls on their audience or even...