This song, featured on the 1966 album Revolver, is largely credited to John Lennon, though he later dismissed it as a "throwaway." Its lyrics are quite oblique, leading to several interpretations of its meaning. One theory suggests it was a response to a magazine profile of Frank Sinatra, while another posits it was aimed at Mick Jagger. Lennon's first wife recalled that the song was inspired by a clockwork bird in a cage she gave him, which he saw as a metaphor for their marriage and her inability to understand him. The song features an extended dual-guitar melody, anticipating later rock styles. At its heart, it plays like a puzzle, inviting listeners to find their own understanding within its mysterious lines.