Why is the book called 50 shades of grey

Fifty Shades of Physical and Emotional Abuse, a book review by The Dom

E L James Fifty Shades Of Grey (Full Book) (Part 1)

I Read 50 SHADES OF GREY From Christian's POV so You Don't Have To | Grey Explained

The Worst Book I've EVER Read.

READING FIFTY SHADES OF GREY FOR THE FIRST TIME

Fifty Shades of Grey is hilariously dumb...

Fifty Shades of Gray Pitch Meeting

50 Shades of Grey Book Review

50 Shades of Grey reading, Chapter 1

Gilbert Gottfried Reads 50 Shades of Grey

Fifty Shades of Grey Explained For Prudes! (A Comedic Commentary)

Retro review: Fifty Shades of Grey

Fifty Shades of Grey: Terms of the Contract

Ellen Reads '50 Shades of Grey'

'Fifty Shades Of Grey' Author E.L. James Cheekily Confesses Who Mr. Grey Was Based Off Of | Access

Fifty Shades of Grey BOOK Review!

Fifty Shades Trilogy | Christian and Ana - A Thousand Years

Fifty Shades of what am I Doing with My Life (Fifty Shades of Grey rant)