According to the story, McCartney wrote this song when was 16 and forgot about it until his father turned 64, which happened to be as the Beatles were recording 'Sgt. Pepper's Lonely Hearts Club ...

I was born on April 14, 1957, so the Beatles' "When I'm Sixty-Four" is my favourite song today ... console stereo and reading along to the lyrics printed on the back cover. Steve Newton Over ...

These iconic Beatles lyrics were one change of heart or misdirection away from becoming something entirely different.