Bad Boy by The Beatles is a classic rock song that tells the story of a rebellious young man who causes trouble and frustrates his parents. The key themes include teenage rebellion, parental concern, and the consequences of misbehavior. The song captures the lively and carefree attitude of youth while highlighting the tension between generations. Particularly poignant moments include the detailed actions of the young boy's mischiefs, such as listening to loud rock and roll music and ignoring his parents' warnings, which underscore the clash between youthful defiance and parental authority.