Timing
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By Lesley Alderman

TimingIt takes 31 minutes to walk off a brownie. Shocked? Relieved? That's the kind of quirky knowledge Lesley Alderman serves up in The Book of Times, a compendium of surprising measurements of everything from love affairs to mental functions. How much of our waking time do we spend daydreaming? Nearly half. How long does it take to have sex, on average? A brisk 19.2 minutes. Now, try your hand at more clock and calendar trivia.