The song is a music hall comedy number and is perhaps the silliest song in the Beatles' catalogue. Lennon came up with the lyrics and title after seeing a phone book. He said: McCartney once told Beatles recording analyst Mark Lewisohn, "[People] are only just discovering things like 'You Know My Name (Look Up the Number)'—probably my favourite Beatles' track!" He went on to explain: The song features a saxophone solo played by the Rolling Stones' Brian Jones.