I checked out 3 of these stories by EL James. Pretty good stuff if you like to read. At the time I didn't have the patience to read them all. Any horny housewife or office girl who doesn't mind being a bit dominated would go for this. That is what I got out of it.
Fifty Shades of Grey Fifty Shades of Darker Fifty Shades Freed
Keira Knightley should star in it, I like to see her bound and whipped.........of course she might object? until she has a ball gag placed in her mouth and then she can whimper all she wants!