Harrison wrote the song for Pattie Boyd, the English model whom he married in January 1966. The lyrics convey an ambivalent tone, however, and have invited interpretation as a message to a casual love interest. Harrison based the song's jangly guitar riff on a riff used by Roger McGuinn in the Byrds' adaptation of "The Bells of Rhymney". "If I Needed Someone" features prominent three-part harmony vocals and Rickenbacker twelve-string electric guitar – the instrument that the Byrds had adopted to replicate Harrison's sound in the 1964 film "A Hard Day's Night". The song's use of drone and Mixolydian harmony also reflected Harrison's nascent interest in Indian classical music. Following its inclusion in the set list for the Beatles' 1965 UK tour, it became the only Harrison composition performed live by the group.