(via Quora) Answered by Eli Matawaran
John Lennon thought the first line, “Please lock me away”, was laughable. And he added:
“I think it was resurrected from the past…I think he (Paul McCartney) had the whole song before the Beatles.”
Yes, McCartney had written it when he was only 16 and before the Beatles but it was an unfinished song.
Maybe Lennon didn’t realized it was unfinished because he had already rejected it based on the first few lines.
When McCartney moved into the London home of his then girlfriend Jane Asher, he shared a room with her brother Peter, a singer-guitarist…
Read more: https://www.quora.com/Why-didn-t-The-Beatles-record-A-World-Without-Love