A strong contender for the most satisfying TV clip of the year comes from a recent interview by Oprah Winfrey with the writer Belle Burden, whose memoir, Strangers, was parked at the top of the US bestseller lists for months. Burden tells the story of how her husband coldly walked out on his family, only returning, she tells Winfrey, to inform the kids the marriage was over and demand of the wife on whom he had cheated, “I’m starving – can you make me a sandwich?”

There are many small cruelties in the book, but this, among the worst, triggers outright pantomime incredulity from Winfrey, who murmurs, “Even the cameraman said ‘oh’.” Burden wanted to model kindness in front of her daughters; she wanted to show her husband exactly what he had walked out on. “So,” says Winfrey, arriving at what appears to be the outer limits of her famous ability to empathise, “you made him the sandwich?!!” Burden smiles, weakly. “I made the sandwich.”

Strangers: A Memoir of a Marriage has become a phenomenon since it was published in January, triggering endless discussion about how much anyone really knows about their partner. As well as admiration for Burden, a 56-year-old who – throughout a storm of publicity –........

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