I’m standing in line at the grocery store. The woman ahead of me has a child sitting in the grocery cart as they check out. The child asks for a candy bar and the mother replies “not today.” The child asks in a louder tone of voice and the mother lowers her tone but becomes more serious with “no.” This doesn’t please the child, who then starts crying and screaming for a candy bar. People around notice what’s happening, which is not lost on the mother. As the child’s screaming ...