Worrying about what's on show, hands where they shouldn't be, or even hands where they should be. The idea of taking off all your clothes in front of a crew full of people, feeling up a co-star you may have only met days before and a camera lens recording every moment must be something of a daunting task for even the most attention-seeking of stars, but sex scenes are unavoidable in many movies.
So what really goes on behind the scenes of a passionate moment on film? Surely there must be some upside getting into bed with Ryan Gosling? We delved into the celebrity archives to find out just how our favourite actresses cope with faking it.
Who needed to down some shots beforehand, who eventually found it "fun" and who told her A-list co-star to get out of her light? Read on They need to move the story forward and the characters forward. Reese Witherspoon's departure from her 'America's sweetheart' image continues in Wild - the real-life story of former drug addict Cheryl Strayed.
Of the film's sex scenes, Reese said : "'[They were], like, three per cent of the movie, but it took up a tremendous amount of fear in my mind because it's daunting. In another interview , she revealed: "I didn't want to do any of it I called Cheryl the day before and I was like, 'I have to do this scene in this alley and I'm having sex with two guys' and I'm like, 'Why did you do this?!
And for Keira Knightley, some steadying shots of booze. Sex scenes are probably daunting enough, but rolling around with Leonardo DiCaprio could turn most into a quivering wreck.
