The lyrics were written in a Liverpool Institute exercise book. "Remember: The Recollections and Photographs of the Beatles", a book by McCartney's brother Mike McCartney, includes a photograph taken in the front room of his home of Lennon and McCartney writing the song while strumming their acoustic guitars and reading the exercise book. It typified how Lennon and McCartney would later work in partnership, as McCartney subsequently reflected: "I had 'She was just seventeen,' and then 'never been a beauty queen'. When I showed it to John, he screamed with laughter, and said 'You're joking about that line, aren't you?'" "We came up with, 'You know what I mean.' Which was good, because you don't know what I mean." "It was one of the first times he ever went 'What? Must change that ...'" Lennon said: "That's Paul doing his usual good job of producing what George Martin used to call a 'potboiler'. I helped with a couple of the lyrics." The songwriting credit on the "Please Please Me" liner notes is "McCartney–Lennon" which differs from the more familiar "Lennon–McCartney" that appears on subsequent releases.