Kristen Stewart's sex scenes in "On the Road" are "fairly ridiculous" to watch as isolated moments, according to the actress.

In a new interview with Indiewire, Stewart said that though those sex scenes are difficult to watch, they fit in with the film as a whole.

"To be honest, I think if you were to isolate the scenes, it’s fairly ridiculous watching yourself fake have sex," she said. "But within the movie, watching the movie, I do get so caught up in this one. I’ve seen it three times, and that’s not typical for me. I have to complete the process, I need to watch the movie at the end of it."

In the new adaptation of Jack Kerouac's "On the Road," Stewart plays Marylou, a young woman who marries Dean Moriarty (played by Garrett Hedlund), and has sex with both Dean and Sal Paradise (Sam Riley). As Stewart told HuffPost Entertainment, it was imperative to keep the nudity and sex scenes in the film.

"Actresses love to stand up and say, after they've shown their t*ts in a movie, that it was done tastefully and that it was, you know, far from gratuitous," she told HuffPost Entertainment. "I mean, projects that really require it are really few and far between. And I think that in this case, it needed to be. This book celebrates being alive and it celebrates being human, and if you want to cover up and deny any aspect of that, you are denying the spirit of the book. I think that it would have been so wrong to shy away from anything in this movie. I think that I would have gotten flak for that. I think that it would have been that I was scared to disappoint my 'Twilight' fans or something."

Stewart said the experience of making "On the Road" was one that she wouldn't soon forget.