When I was a kid, my grandpa insisted on chewing each bite nine times. He told my sisters and me to do it, too, claiming the practice aids digestion. Now in his 80s, my grandfather probably still counts each bite, but I no longer do. In fact, I hadn't thought of this morsel of family advice for years, destining it to die with a previous generation. Recently, as I wandered the Burke Museum's featured exhibit "Hungry World: What the World Eats," family sayings and memories of the dinner table came back to me. ...