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Matthew Fox Talks About His Dark Side

Matthew Fox, who plays the heroic Dr. Jack Shephard on ABC's castaway drama "Lost," has a dark side.

"I'm a liar and a cheat and a thief and the ultimate manipulator. I tell lies every day, man," the 40-year-old actor says in the February issue of Men's Journal magazine. "And when I say I'm phenomenally manipulative, I am."

Fox, who is now starring opposite Matthew McConaughey in "We Are Marshall," a Warner Bros. Pictures release, says he "can be unapologetically vicious" and is "absolutely an instigator."

"I really enjoy social boozing, and what I enjoy about it is when people I know and care about say and do things they normally wouldn't say or do," he tells the magazine. "To make that happen I'll instigate anything."

Fox also enjoys skinny-dipping, something he does, he says, because he's comfortable in the nude.

"As for the skinny-dipping, when I was a kid there wasn't a huge delineation in our family between having clothes on or not having clothes on," he says.

"And the reason I have so much fun doing it now is people are so shocked by it, and, like, 'Oh, my God, Fox just took his clothes off!' But, I mean, just how long ago was it that we were all wandering around in loincloths?"

"Lost" is on hiatus until February. When it resumes it will continue without a break through May.