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A friend jokes that his wife is a slave to their coffee
maker, which emits five beeps when the coffee is ready. Between the first and
fifth beep, his wife can cover any distance to the kitchen, however engrossed
she may have been in a book or conversation before that first beep.

He finds her Pavlovian response a daily source of amusement,but I've seen what happens when his phone alerts him to a new email or textmessage. At the sound of the beep, he stops whatever he is doing and checks...