And he says evidence shows the drop in teen pregnancy rates was not down to contraception and the morning-after pill. In fact, he refers to a study that found access to emergency contraception increases the rates of sexually transmitted diseases, risk-taking and a false sense of security, while doing nothing to reduce the number of abortions.
These studies are no doubt legitimate and back up the Family First message of abstinence.
But I still find it hard to believe more teenagers than nine years ago are abstaining from or postponing sex. It seems more likely they have simply got smarter about contraception, as teens are getting smarter and more aware about many aspects of the world around them.
Encouraging teens to abstain, or to at least think very carefully before taking that step, is not a bad thing. It's a big step, one many young people take way too soon, before they are ready to deal with all the consequences - emotional, physical and social. But the reality is teenagers will go ahead and do what they do, regardless of what the grown-ups tell them.
So as well as preaching abstinence, we must continue to teach teenagers about contraception, including the emergency kind, as well as making sure they have access to it. That way we have all our bases covered.