Topping and tailing this collection are The Visitor and Bitch, stories featuring Dahl's notorious hedonist Oswald Hendryks Cornelius (or plain old Uncle Oswald) whose exploits are frequently as extraordinary as they are scandalous. In the middle, meanwhile, are The Great Switcheroo and The Last Act , two stories exploring a darker side of desire and pleasure. In the black comedies of Switch Bitch, Roald Dahl brilliantly captures the ins and outs, highs and lows of sex.