Most of the stories of the White Album sessions are dark. There’s the one about Ringo feeling so unwanted he left the country while recording “Back in the USSR.” Or how George Harrison brought in Eric Clapton so the other Beatles would pay attention to a song he wrote.
Paul McCartney famously referred to this record as “the tension album,” and the selfishness of the band members was a big part of that. According to just about everyone there, you’d only see a Beatle get excited when recording one of his own songs. Otherwise, it was every man for himself.
But there were exceptions. Before “Ob-La-Di, Ob-La-Da” became a sore spot for all parties, the Fab Four had a grand old time goofing around doing the backing vocals. And, judging by Beatles quotes, it sounds like they also had fun recording “Happiness Is a Warm Gun.”
After they’d finished the record, Paul described that John Lennon-penned classic as a highlight of The White Album. In fact, he went out of his way to describe how much he loved “Happiness.”
Source: cheatsheet.com