But, whilst speaking to PlayBoy in 1980, Lennon explained how he almost turned his friend down when he asked for help.
The song in question was Taxman – a song based on the band getting taxed so much after finally making some money.
“I remember the day he called to ask for help on ‘Taxman’,” Lennon recalled in the interview. “One of his first songs.
“I threw in a few one-liners to help the song along, because that’s what he asked for.”