Is it because all Paul needed was love?
Though he once used so much cannabis he was locked up for 35 years ago, those days are long gone.
“I don’t do it any more,” he explains. “Why? The truth is I don’t really want to set an example to my kids and grandkids. It’s now a parent thing.
“Back then I was just some guy around London having a ball, and the kids were little so I’d just try and keep it out of their faces.
“Instead of smoking a spliff I’ll now have a glass of red wine or a nice margarita. The last time I smoked was a long time ago.”
First introduced to smoking weed by Bob Dylan in August 1964, Macca later claimed the drug got him “thinking for the first time, really thinking” and helped his songwriting.
Read more: The Mirror