I found it hilarious that the entry at thebookspoiler.com is next to Stephanie Meyer's Twilight books.
IIRC, “50 Shades of Grey” began as “Twilight” fan fiction.
reading the synopsis at http://www.themoviespoiler.com
creates the real nightmare for hollyweird. Denial of money attacks.
spoiling the movie helps too.
In short this is a movie about a woman who like to be hit during coitus.