The song modulates stylistically between a sweeping piano-and-orchestra ballad similar to McCartney’s “The Long and Winding Road” and upbeat rock sections before ending in a raucous and passionate finale.Paul first presented this composition for The Beatles’ consideration during the Get Back rehearsals on 14 January 1969 at Twickenham Film Studios in London, but the album was aborted before anything could be done with the song, which eventually did not make it onto Let It Be either.
Paul talks: “The Back Seat of My Car is the ultimate teenage song, and even though it was a long time since I was a teenager and had to go to a girl’s dad and explain myself, it’s that kind of meet-the-parents song. It’s a good old driving song. [Sings] “We can make it to Mexico City.” I’ve never driven to Mexico City, but it’s imagination. And obviously “back seat” is snogging, making love”
