Paedophiles are being treated with medication as part of a study to see whether it can prevent them from abusing children.
Patients in Sweden - who admit to being attracted to them but haven't been convicted of any crimes - are being given a drug to reduce their testosterone levels.
Doctors hope it'll reduce their sexual urges.
Peter Saunders, who speaks for people who were abused as children, is cautious about its potential success.
