Michael Buerk chairs a debate on the moral questions behind the week's news. Clifford Longley, Claire Fox, Matthew Taylor and Melanie Phillips cross-examine witnesses. Britain has the highest rate of teenage pregnancies in Western Europe, so what role should morality play in sex education? A new government leaflet advising parents on how to talk to their children about sex and relationships warns against trying to convince teenagers of what is right and wrong because it could discourage them from being open. Is this sensible practical advice? Is giving teenagers the room to form their own moral judgements about sex the right way to cut teenage parenthood?