A caller who grew up with 10 brothers and sisters recalls that whenever sibling squabbles erupted, her parents would intervene with a cheery, “Do you think the rain will hurt the rhubarb?” The children were expected to respond with: “Not if it’s in cans!” Such silliness, she says, would get everyone laughing, and the dispute would be defused. Grant and Martha discuss this and other handy non sequiturs. This is part of a complete episode.