Billy Bob Thornton says filming sex scenes made his marriage to Angelina Jolie tough.
The actor was wed to the Hollywood beauty from 2000 to 2003, during which time he filmed 'Monsters Ball' - featuring explicit scenes with Halle Berry - which put pressure on them both.
He told The Sun newspaper: "If you are an actor, even doing a Disney movie or cartoon voices, you could still be away from each other for six months.
"Look how it applied to me. I go away and do a film like 'Monster's Ball' with a very explicit sex scene with Halle Berry. She is one of the most beautiful women in the world and I am talking on the phone to my wife, and she says, 'What have you been doing today?'
And I say, 'Oh, I did that sex scene with Halle Berry.' You are then asked if you actually touch her. I say, 'I had to - it's in the scene'
"[Other people's situations are] hard, with areas of doubt. But if you are a thousand miles from home on a film set simulating sex with a beautiful woman, it's even tougher."
Billy, 58, says he messed up his marriage to Angelina, his fifth wife, because he wasn't sure of himself.
He added: "I blew my marriage to Angelina. I thought I was not good enough for her and I was too insecure. We are still friends."
Billy has been with his current partner, Connie Angland, for ten years, and they have a seven-year-old daughter, Bella, together, but he isn't sure if they should tie the knot.
He added: "Another marriage for me? I am not saying I will and I am not saying I won't. It's funny that people talk so much about me marrying five times. But if an actor who is known as a playboy goes out and sc***s every girl who walks in to a bar, then that's OK. That's hip."