Robbie Williams has admitted being with one woman ''feels unnatural''.

But the 'Candy' singer - whose wife Ayda Field gave birth to their first child Theodora Rose last month - said he has no problem avoiding temptation and staying faithful since giving up alcohol.

He told The Sun newspaper: ''It's a hundred times easier when you don't drink, and I don't drink.

''If I drank, we'd literally be f*****. If I drank, I could not keep it in my trousers at all.

''I always have my wife with me. Always. I haven't missed playing around but I'm still a guy.

''This will be an on-going project. Feels unnatural - but so far, so good.''

The 38-year-old singer recently said he is happier than ever since becoming a father on September 18.

He said: ''Ayda went into labour at 4am and at 3.15 in the afternoon Teddy popped into my world and it changed my life.

''It was cosmic -- it's a magical, magical moment.

''She's got a bit of acid reflux but she's such a chilled baby. I enjoy changing nappies and I really like being a daddy.

''I don't want to be anything other than a daddy and a husband. Life's pretty perfect right now.''