Annalee Newitz at i09 presents Ten of the Kinkiest Science Fiction Books You’ll Ever Read. This one’s my favorite
Set on a planet of psychically-gifted people who embrace sexual diversity and peace, the series is focused mainly on sexual slavery and war. Our heroine is a prostitute (a noble calling on her world) who holds the “high couch” of her town – basically, she’s the sex duchess. Unfortunately she’s always being kidnapped or taken to other worlds where she’s tied up, forced to have degrading sex, and (of course) has lots of tearful, shame-faced orgasms. Silly and pulpy, the first novel in the series is basically a swashbuckler with kinky bondage thrown in between sword fights. Also, there is a giant flying cat.