And he did his best to convince our listeners as he fielded questions from them.
Fourteen-year-old Laura Barritt from Bangor, north Wales, asked the Tory leader what he'd do about underage drinking and whether his party would consider creating public areas for teenagers to drink in.
Laura Barritt is a 14-year-old schoolgirl from Bangor, Gwynedd
Mr Cameron said: "Some of the friends I had, the ones who had the biggest problems, were the ones who were actually never able to drink anything at home.
"Whereas the ones who drink responsibly are the ones who, you know, were given a glass of wine, or a small glass of beer, or a shandy - just to get them to know, this is alcohol, this is what it does, you have to be careful.
"And I think that's the way to do it - in the home."
Asked what age he had first got drunk, Mr Cameron said: "I can't remember but yes, when I was a teenager, I did do some things I shouldn't have done - we all do."
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.