Paul started writing this song, and he wanted to write about a girl so that their female fans could relate to it. Originally, he just had "she was just seventeen/ never been a beauty queen", but John came up with "and you know what I mean". It may also have been inspired by Iris Caldwell, the sister of Rory Storm (whose band Ringo was in before the Beatles), whom Paul had been dating.
Paul started writing this song, and he wanted to write about a girl so that their female fans could relate to it. Originally, he just had "she was just seventeen/ never been a beauty queen", but John came up with "and you know what I mean". It may also have been inspired by Iris Caldwell, the sister of Rory Storm (whose band Ringo was in before the Beatles), whom Paul had been dating.