Although It's typically chilly in December, things are bound to get a whole lot steamier this year with the release of 'Blue Valentine,' starring Michelle Williams and Ryan Gosling. The co-stars dished on their gritty sex scenes for a cover story interview with W for its October 2010 Issue.

"We did the sex scenes, and it was ... toxic," Williams says in the interview. "Ryan and I stopped relating to each other as Ryan and Michelle. Those scenes took forever."

Gosling said the sex scene is not pornographic but does aim for realism. "In real life, sex is messy," he says, "and we wanted to get under that wonderful messiness."

Williams also talks about her experience with nudity in movies and her concerns about the photos getting posted online.

"I have the usual self-loathing and body issues, and yet I seem to be naked in a lot of movies," Williams says. "It would be really nice if the pictures did not get posed online. But then maybe that's the reason to do it: Just get naked, and who cares if it ends up on the Internet."

Gosling also talks about how he consciously forced himself to get rid of his Canadian accent to come off more manly, while also trademarking an original voice.

"As a kid, I decided that a Canadian accent doesn't sound tough. I thought guys should sound like Marlon Brando," the Oscar nominated actor says. "So now I have a phony accent that I can't shake, so it's not phony anymore. I'm going for the Madonna thing, the Lady Gaga thing -- a phony accent that becomes your trademark."