Ashton Kutcher:Demi Becomes More Beautiful By The Minute

He's boyish, and she's beautiful – and to Ashton Kutcher, wife Demi Moore just keeps getting better every day.

"Doesn't she? I don't know – I'm trying to figure it out. I so see it, man," he said on Monday's red carpet of the Hollywood premiere of the movie Spread, in which he plays a professional good-time guy. "She becomes more beautiful to me by the minute, and I don't know what it is. She's got the magic thing."

Kutcher is also one of the producers of the R-rated movie (it opens Aug. 14), which contains sexual content, nudity and strong language. And how did Moore, 46, react to his role in the provocative picture? With pride, says her husband. "She appreciated the work that I did and she thinks it's a good movie," Kutcher, 31, told People.

Ashton is stepdad to Demi's three daughters with her ex Bruce Willis: Rumer, 21 this month, Scout, 18, and Tallulah, 15.