It's post-Thanksgiving so I suppose I must say something about overeating. Fad diets contribute to obesity, says the president of the British Society of Gastroenterology. He singles out Atkins, Raw, Hallelujah (fruits and seeds, as mentioned in the Book of Genesis), and Grapefruit diets for particular scorn. Why? He doesn't say. His otherwise sensible conclusion: "The problem facing society is not the content of our diet but it's the quantity we are consuming and the consequential impact of obesity."

Ah yes, quantity. Probably best not to mention it this week. Enjoy the weekend!