Elizabeth Olsen approves of bestselling erotic novel "Fifty Shades Of Grey" by E.L. James because it helps women openly discuss their sexuality.
 
The younger sister of fashion designer twins Mary-Kate and Ashley thinks it is happy female readers are embracing their fantasies after reading the sexy novel.
 
She told BullettMedia.com, "It's had a huge impact on society. Apparently rope sales have skyrocketed because women who've read the book are really getting into bondage, which is kind of great. It's such a taboo for women to actually discuss sexuality without the help of Cosmopolitan.
 
"All of a sudden, this book has become a sensation because the women reading it haven't had access to this kind of thing before. I was talking to a guy who was making a joke about it, saying, 'Clearly these women just need to watch porn.' In a way, he's right."
 
However, Olsen absolutely won't play heroine Anastasia Steele in the upcoming big-screen adaptation. When asked if she would sign up for the role, she said, "No, no, no!"

Olsen has starred in "Silent House" and "Martha Marcy May Marlene."