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Sharon Stone played the interrogation scene as if she were playing a game. Instead of allowing male law enforcement to intimidate her character, Stone played the role with confidence. "The ruse they use-'We have the power, we're going to show you'-didn't cut the mustard with Catherine," Stone told Playboy. "Her attitude was, 'You're so powerful. Aren't you cute!', and, of course, she had all the power. These men put her in a position where she was alone in a chair in the center of an empty room-surrounded. That would be a very intimidating position, in which to be, unless she disarmed them, which she did. At the police station, she could have been stricken and scared. But instead she thought, 'This is going to be fun. Oh, so you want me to sit in the middle of the room here? Oh, charming. Why is that? You want to make sure you can look up my dress? Okay, you can look up my dress.' It was a game."
No body doubles were used in any of the sex scenes.
Upon seeing the film, Steven Spielberg noticed Wayne Knight and immediately wanted him to play Dennis Nedry in Jurassic Park (1993). He stayed through the end credits just to find his name, and Knight ended up being the first actor cast.
Paul Verhoeven had some disagreements with Michael Douglas over his direction of Sharon Stone. Stone was reportedly very nervous and insecure, and in her first scenes, she was unable to replicate the performance that she had given during her audition. According to Verhoeven, she came very close to being replaced, but since he knew she had what the role required, he coached her intensively to get the required performance out of her. However, this caused Douglas to feel left out, as Verhoeven thought that Douglas, as an established actor, no longer needed such close attention. It eventually lead to a very heated argument in a trailer, the stress of which caused Verhoeven to burst a vein in his nose that caused profuse bleeding. When he went outside with blood-stained clothes, crew members believed that Douglas had physically hit him in the face.
Sharon Stone was director Paul Verhoeven's choice, but was only offered the role of Catherine after thirteen actresses had turned it down as she was not a marquee name at the time.
Michael Douglas felt an established star was needed to play Catherine, so the movie would be carried by two well-known actors, and the risk of career damage would also be shared. He suggested Demi Moore or Michelle Pfeiffer for the part, but no actress of name was prepared to go completely nude for the role. Pfeiffer said she found the idea of filming the erotic love scenes too daunting. "I just couldn't do that one, because of the sexual parts, the nudity," she's said. "My father was still alive. I'm kind of prudish. And honestly? I am not that uninhibited about my body. I'm modest."