Paul McCartney said a classic song from The Beatles' 'The White Album' came from a difficult time in John Lennon's life.Paul McCartney said John Lennon got into heroin while writing songs for The Beatles’ The White Album. John was suffering at the time. Subsequently, Paul said that John’s suffering led to a good track.The 1997 book Paul McCartney: Many Years From Now discusses”Everybody’s Got Something to Hide Except Me and My Monkey” from The Beatles’ The White Album. In the 1940s and 1950s, “monkey on the back” or “monkey” were slang terms from the jazz subculture. They both referred to heroin addiction.
Source: Matthew Trzcinski/cheatsheet.com