To judge whether your partner is stupid, you don't need to look elsewhere—just consider these three points: First, he listens to everyone else's words but ignores yours; he believes everyone else's words but doesn't trust yours. Second, he talks about everything at home to outsiders—treating good news as entertainment and bad news as venting. Third, he's always polite and friendly when talking to others, but when he talks to you, there's always a fiery tone.