The 70-year-old singer now favours quiet nights in with his wife Linda because he no longer has the stamina to go out as much as he used to.
He said: 'When you get older you're not as horny as you were when you were young and that's a fact.
'There's got to be an upside to growing old and that side of my life is not important any more, like it was.
'My wife and me still love each other dearly. We're growing old together. I'm not out and about clubbing like I used to be and that's a good thing.
'You can't. It's impossible. The desire to do all the s**t just isn't there any more.'
The 'What's New Pussycat' hitmaker also admits he doesn't know how much longer he can go on in the music industry but insists he doesn't worry too much about what the future holds.
He added in an interview with The Sun newspaper: 'With getting older, time is getting shorter and that's the problem.
't's a fact. I don't know how long I can go on. It's not like when I was 50. But I'm not going to moan about it because I'm still singing and I'm still doing it and it's hasn't affected me yet.'
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