Why Don't We Do It In The Road? was written by Paul while on holiday in Rishikesh, India, after seeing two monkeys copulating in the middle of the street. The song was recorded completely by Paul in Studio 1 at Abbey Road while John and George worked elsewhere.
"A male just hopped on the back of this female and gave her one, as they say in the vernacular. Within two or three seconds he hopped off again and looked around as if to say, 'It wasn't me,' and she looked around as if there'd been some mild disturbance...And I thought...that's how simple the act of procreation is...We have horrendous problems with it, and yet animals don't." - Paul, on the song's origins
"That's Paul. He even recorded it by himself in another room. That's how it was getting in those days. We came in and he'd made the whole record. Him drumming. Him playing the piano. Him singing. But he couldn't—he couldn't—maybe he couldn't make the break from the Beatles. I don't know what it was, you know. I enjoyed the track. Still, I can't speak for George, but I was always hurt when Paul would knock something off without involving us. But that's just the way it was then." - John, Playboy, 1980