One of the earliest stories the publication asked about was whether he and John Lennon took part in group masturbation back in the day.
"What it was was over at John's house, and it was just a group of us," McCartney explained. "And instead of just getting roaring drunk and partying -- I don't even know if we were staying over or anything -- we were all just in these chairs, and the lights were out, and somebody started masturbating, so we all did."
In addition to Paul and John, some of Lennon's friends were also present, and they'd all yell out celebrity names to help them complete the task at hand. "We were just, 'Brigitte Bardot!' 'Whoo!'" McCartney said, "and then everyone would thrash a bit more."
"I think it was John sort of said, 'Winston Churchill!'" McCartney added.
"I think it was a one-off. Or maybe it was like a two-off. It wasn't a big thing," he said, looking back. "But, you know, it was just the kind of thing you didn't think much of. It was just a group. Yeah, it's quite raunchy when you think about it. There's so many things like that from when you're a kid that you look back on and you're, 'Did we do that?' But it was good harmless fun. It didn't hurt anyone. Not even Brigitte Bardot."
As for the tale that the rest of the band listened as a 17-year-old George Harrison lost his virginity, then erupted in applause when he finished? "I think that's true."
"The thing is, these stories, particularly Beatles stories, they get to be legendary, and I do have to check: Wait a minute. I know we had one bed and two sets of bunks, and if one of the guys brought a girl back, they could just be in the bed with a blanket over them, and you wouldn't really notice much except a little bit of movement," he said. "I don't know whether that was George losing his virginity -- it might have been.
"I mean, I think in the end this was one of the strengths of the Beatles, this enforced closeness which I always liken to army buddies," added Paul. "Because you're all in the same barracks. We were always very close and on top of each other, which meant you could totally read each other."
We've already covered group masturbation, but what about group sex?
"There weren't really orgies, to my knowledge. There were sexual encounters of the celestial kind, and there were groupies," said McCartney, who added that he's just "not into orgies."
"I don't want anyone else there, personally. It ruins it! I would think -- I've never actually done it," he continued. "There was once when we were in Vegas where the tour guy, a fixer, said, 'You're going to Vegas, guys—you want a hooker?' We were all, 'Yeah!' And I requested two. And I had them, and it was a wonderful experience. But that's the closest I ever came to an orgy."