One of my favourite novels is Cheri, by the French author, Colette. It tells the story of a beautiful young man who is cossetted and spoiled by his mistress – in the dominating sense of that word – and lover, Léa, an older woman. The book opens in Léa’s boudoir, where she is dressing, and Chéri is lounging on her messy bed, naked except for a long string of Léa’s pearls. ‘Give them to me,’ he says, commanding, then pleading, then seductive. The pearls look beautiful on her, Léa reflects as she dresses, but they look even more beautiful on Chéri….