The Beatles legend was inspired to finally quit the drug while raising eight-year-old Beatrice ' his daughter with ex-wife Heather Mills. Paul was reportedly introduced to cannabis by Bob Dylan during the 60s, but revealed the arrival of Beatrice has made him re-evaluate his life: "I did a lot, and it was enough,' he told Rolling Stone magazine. 'I smoked my share. When you're bringing up a youngster, your sense of responsibility does kick in, if you're lucky, at some point. Enough's enough ' you just don't seem to think it's necessary."
The 69-year-old musician is believed to have experimented with a host of other substances including heroin, cocaine and LSD - but has always insisted his drug use wasn't excessive. Paul has now cleaned up his act and is happily settled with his third wife Nancy Shevell ' who he married in October last year.
During the interview, the musician went on to speak about The Beatles. He revealed the band ' also featuring John Lennon, Ringo Starr and George Harrison ' had spoken about reforming, but eventually decided against the idea: "There was more passion behind retiring,' he explained. 'We'd all said, very convincingly, 'We've come full circle'. And more importantly, it could have been so wrong that it spoiled the whole idea of the Beatles; so wrong that they'd be like, 'Oh, my God, they weren't any good'. So the re-formation suggestions were never convincing enough.'
The music legend also discussed his desire for performing live. Paul insists he has no intention of retiring any time soon and wants to continue into his 80s: "You get the argument 'make way for the young kids', and you think, 'F**k that, let them make way for themselves. If they're better than me, they'll beat me,'' he smiled.