Every four years, the world holds a curling tournament that most people refer to as “the Winter Olympics.” Yes, the ice dancers will dance, the ski jumpers will jump, and the double lugers will inexplicably stack on top of each other to hurtle down a track at 80 miles an hour. But in my house, nearly every day of the 25th Winter Games will be spent watching men and women sweeping ice to make way for 40-pound granite rocks.