A BOOKWORM'S THEMATIC BOOK LISTS
The first post , 3 Steamy Books , was about romance novels with a bit of kink thrown in, and I stumbled upon The Tiny Death via people liking this post. It's a "... a site devoted to the critique and appreciation of high quality erotic literature. It is a collaborative effort and we encourage feedback, and suggestions." The themes range from contemporary stuff to paranormal and further while focusing on quality work.
If you're an avid erotic literature reader or if you're just getting your feet wet, I'm sure you'll find something interesting among the posts. Perhaps your next book.
THETINYDEATH
Also, if you're more interested in BD/SM rather than romance or erotic literature Belasarius might be a good place to visit. The author writes about dominant/submissive relationships in another site but focuses on the surveys he does in his blog. There are interesting tidbits of information laid out as survey data.
BELASARIUS