Paul McCartney believes that the humor and resilient outlook he learned from his upbringing in postwar Liverpool were foundational to The Beatles' own sense of humor.

“And I think that was something that found its way into the Beatles. And I think it gave us a good sense of humor. That no matter what we were going to do, like arrive in America and have the New York press ready to make fun of us, we gave as good as we got. And that was cuz of our Liverpool upbringi”