“When I’m Sixty-Four” is a naïve love song in which the singer goes about questioning his lover’s commitment to him in a comical sort of way. And he does so by projecting the two of them far into the future, when he’s 64 years old, and she’s a comparable age.

The first of the Sgt Pepper songs to be recorded, ‘When I’m Sixty-Four’ was originally intended to be the b-side to ‘Strawberry Fields Forever’. The song dates back to The Beatles’ earliest days. Paul McCartney had composed it on the family piano at 20 Forthlin Road, Liverpool “when I was about 15”.