"I couldn't actually tell you what I look for because it's different in each woman, but part of it is being smart and part of it is being dumb," Contactmusic quoted him as saying.
He added: "Sometimes along the way in my life I don't want a smart woman right now, I want a dumb woman. But then you think, 'That doesn't work, now I want a smart woman.' Then you get a smart woman and you go, 'No, that doesn't work.' So it's just killing me right now."
However, the 39-year-old actor has laughed off reports that he dated his The Bounty co-star Jennifer, insisting that he has had enough of being linked to different Hollywood beauties. He joked: "Oh Jennifer Aniston and I are getting married, then I'm marrying Cameron Diaz, then I'm marrying Joan Rivers and I'm going to be a busy guy."