Celebrity couple Ashton Kutcher and Demi Moore's marriage works because they refuse to argue with each other. The pair will celebrate their first wedding anniversary next month (SEPT06) and Kutcher claims their bond is stronger than ever. He tells American magazine Parade the relationship has "the same energy as before, but more depth." Kutcher, 28, says of life with his 43-year-old wife, "We have frustrations, like every relationship. It's just the way we deal with them." The DUDE, WHERE'S MY CAR star says he witnessed his mother and step-father argue and then "not talk for a day". He says, "We had one argument in the first three months of dating, and since then we haven't had any. We deal with issues before they become arguments. "I've never tried to change my wife, and she has never tried to change me. It does bad things when you turn the other person into the ball and chain in your life."