The Oscar-winning actress - who has appeared totally naked in 'Titanic' and 'Mildred Pierce' - thinks flashing the flesh in front of a camera is a "profoundly bizarre" and "unethical" thing to do.
"I hate it! Listen, make no mistake, I just get on it. I just go in and say 'Oh f**k, let's do it,' and boom!" she revealed.
"If you complain about it or procrastinate it's not going to go away. It's a profoundly bizarre thing to do." she added.
"As actors you talk about it all the time. You can literally be tangled in sheets, and you turn to the other actor and say, 'What the f**k are we doing?' 'Dear Mum, at work today I had so-and-so's left nut sack pressed against my cheek'. It's sort of unethical if you think about it in those terms."
Despite admitting to always feeling nervous before she takes on a new project, the 35-year-old star - who won the 2008 Academy Award for Best Actress in 'The Reader' - hopes her jitters continue as the day she finds a role easy she has vowed not to "f***ing bother"anymore.
Kate added to V magazine: "I hope I am s***ing myself over the characters I play for the rest of my life, because the day I go, 'Oh yeah, that's going to be a piece of pie', why f***ing bother? If you do that, you do not learn."
"I hope I'm always learning something. So I won an Oscar. It's amazing. I've got that for the rest of my life for a performance I am proud of. It nearly killed me. I am really proud of the film."