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As the resourceful but hard-partying eldest Gallagher child Fiona on Showtime's Shameless, Emmy Rossum has had to film more than her fair share of sex scenes. So how does she really feel about baring it all in the front of the camera, and subsequently, in front of the world?

"The first time, I had a couple beers," Rossum says on the latest episode of Rove LA, airing Saturday at midnight/11c on TV Guide Network. "But then I got on with it. It's part of telling a story. Sometimes people have sex."

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How can Rossum be so nonchalant about those revealing scenes? Because, as she and fellow guest Aisha Tyler explain, fake sex is not even really sexy. "Literally, if we started fake-doing it right now, it would be so not sexy," Rossum says as she leans towards Tyler.

So what happened next? Watch the clip to find out:

Rove LA airs Saturdays at midnight/11c on TV Guide Network.