Breaking up is hard to do for Luke Wilson. The My Super Ex-Girlfriend star recently told Howard Stern: "Even if I want out, I don't have the guts to just leave." The actor, who was a guest on Stern's Sirius Satellite Radio show, has a roster of exes that includes Gwyneth Paltrow and Drew Barrymore.

"I just start acting really surly and cranky until they leave me. I don't think anything's over the line when you want out. You see the fence, and you just start running for it."

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How long does it take until the ladies to get the hint and leave? "I'd say you need 90 days. It's almost like double time, though, because three months feels like six months because you're so horrible to be with."