McCartney provided the fourth verse of the song, a short piano piece he had been working on by himself, with lyrics about a commuter whose uneventful morning routine leads him to drift off into a dream. He had written the piece as a wistful recollection of his younger years, which included riding the bus to school, smoking, and going to class. The line "I'd love to turn you on", which concludes both verse sections, was, according to Lennon, also contributed by McCartney; Lennon said "I had the bulk of the song and the words, but he contributed this little lick floating around in his head that he couldn't use for anything."