When it comes to human failings, I always try to be understanding. In fact, readers of my Saturday advice column in the Mail will know that it’s my stock-in-trade. But there are times, I’m afraid, when sympathy fails me and I am left nursing a deep anger which needs putting into words. Sometimes, even those words fail me. How else to respond to this week’s story of well-educated girls — brought up in decent homes with every privilege — choosing to sell their bodies for a fast buck, not caring how many footballers use them in one week?