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 could n't use for anything . '' John said : `` I had the bulk of the song and the words , but he contributed this little lick floating around in his head that he could n't use for anything . ''