You need to be crude and rude to teach schoolboys about caring sexual behaviour, says an expert who has enlisted the help of vulgar comedians.
Boys don't discuss their relationships, and the sex education at school is not relevant to them, says Queensland University of Technology professor Alan McKee.
However, they do respond to profoundly vulgar and sexualised jokes.
Girls get useful information from magazines and chatting to friends, but different methods are needed to engage with boys, says Professor McKee, a speaker at a sexual health conference in Darwin.
"There's a lot we can learn from the entertainment industry about how to reach your target audience," he says.