Cast member Brad Pitt and actress Angelina Jolie pose at the premiere of the movie "The Curious Case of Benjamin Button" at the Mann's Village theatre in Westwood, California December 8, 2008. The movie opens in the U.S. on December 25. [Agencies]?

Brad Pitt loves changing nappies.

The "Burn After Reading" star - who raises six children with partner Angelina Jolie - insists he is very skilled at dealing with soiled diapers.

Brad - who currently has his hands full with six-month-old twins Knox Leon and Vivienne Marcheline - said: "I'm fairly good with a nappy and all that. You know the secret of a good nappy-change? You've got to do it quick.

"There's something about the air contact that makes them want to go again, you've got to be speedy. I must say, I'm pretty quick - but I've had a lot of practice."

Earlier this week, Angelina was reportedly warned not to have another child.

The 33-year-old actress - whose other biological child with Brad is two-year-old daughter Shiloh - has been told it could damage her health if she falls pregnant again.

A source said: "Her previous pregnancies ended with emergency caesarean sections. She's been told that, at the least, she should not get pregnant for a year after her last delivery, and it would be safer if she did not get pregnant again, ever."

(China Daily/Agencies January 5, 2009)