【明報專訊】Once upon a time Muriel and Sweeny were very good friends. "We did everything together," Sweeny said. "People said we looked and acted like twins. Then we had a falling-out." When people have a falling-out they disagree about something and stop communicating. "I told Sweeny she could eat the flies and I would eat the gnats (蚊、蚋等叮人的小蟲) that got stuck in our webs," Muriel explained. "But she wouldn't agree, so Sweeny has taken her web and gone home!"