Spanking On The Sofa…Are Romances Get Hot All Over?

As an author, I’ve found the phenomenal success of the “vanilla BDSM” novella, Fifty Shades of Grey, at times either bewildering, astonishing, or encouraging.  At all times I have been curious to know why that book, rather than the staggering number of erotic romances -- including some very good BDSM novels written by actual members