When The Beatles started out, Paul McCartney and John Lennon wrote songs and sang so closely together you’d have a hard time saying who did what. In fact, on several Beatles No. 1 hits, you can’t give credit for lead vocals to John or Paul. You have to credit them both.
Later, as the Lennon-McCartney partnership changed, fans witnessed two gifted songwriters going in their own directions. As Paul described it, there was a significant amount of competition, though it was the healthy sort.
“He’d write ‘Strawberry Fields,’ I’d go away and write ‘Penny Lane’ … to compete with each other,” Paul said. “But it was very friendly competition.” Still, though they admired each other’s music, Paul and John weren’t in the habit of giving each other compliments.
In fact, in a 2018 interview, Paul said that John only complimented one of his tunes during their whole time together in The Beatles. The song was so good even Lennon couldn’t deny it.