It caused a sensation in my house when my brother emerged from his preppy teenager chrysalis as a full-fledged dandy. My dad, who once went on TV with a "Purina Dog Chow" tee clearly visible through his shirt, was baffled: "Why are Charlie's pants so small?" he would ask me, confused. The transformation had occurred, as it so often does, at college. Charlie had left in no-nonsense khakis and a serviceable close-cropped haircut. When he returned for Thanksgiving break, it was in microscopic Levi....

