Lennon dashed off the song in one night, and brought it in for comments the following morning. As he described in his 1980 "Playboy" interview, "the next morning I brought in the song … 'cuz there was a little competition between Paul and I as to who got the A-side – who got the hits. If you notice, in the early days the majority of singles, in the movies and everything, were mine … in the early period I'm dominating the group … The reason Paul sang on 'A Hard Day's Night' (in the bridge) is because I couldn't reach the notes." However, McCartney and others remember McCartney collaborating with Lennon.