Paul McCartney has played down long-standing reports of the Beatles' orgies, insisting he once had a threesome in Las Vegas - but that was it.

The Maybe I'm Amazed singer admits he and the other members of the Fab Four weren't saints on the road and they often hooked up with groupies, but he insists stories about sex parties with multiple women are a bit far-fetched.

"There weren't really orgies, to my knowledge," he tells GQ magazine. "There were sexual encounters of the celestial kind, and there were groupies.

"There was once (a time) 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."

But Paul wouldn't be surprised if bandmate John Lennon got it in with more than the occasional groupie or hooker.

"I think John was a little more that way, because thinking back, I remember there was someone in a club that he'd met, and they'd gone back to the house because the wife fancied John, wanted to have sex with him," he recalls, "so that happened, and John discovered the husband was watching. That was called kinky in those days."

Meanwhile, Macca also disputes a Beatles myth surrounding the night George Harrison lost his virginity at 17 - reports suggest his bandmates were there to cheer him on.

"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...'

"I don't know whether that was George losing his virginity... 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. 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."