Barty snorted. "Teenage boys are hardly some grand mystery to me, Draco." He switched to saying the boy's first name and used a spell to illuminate the room, trying to gauge where it could be. "He gets under your skin. You get under his skin. You spend too much time talking about each other. All your friends already roll their eyes. You think that's the first time that has ever happened?"

He shook his head, smiling weakly. "The only difference is that most are at least slightly more self-aware than you. At least I was."