Paedophiles are cunning. It’s one of those things we’re always told but doesn’t sink in – until we’re confronted by the sort of detail revealed in last night’s BBC Two documentary This World: The Shame of the Catholic Church. Father Eugene Greene of Donegal liked to fiddle with altar boys, and he knew how to go about it. He’d invite one of them to drive his car. That’s pretty exciting when you’re 12 years old – and an honour, too, given that it’s Father’s car. “Both hands on the wheel!” said the priest. And then he’d reach over. I don’t think I need say any more.