kinky SF

Chas Clifton: Kink on other planets reports on a blog-post of ten of the kinkiest SF/F novels ever.  According to the commenters, several are missing.  (Well, I suppose it's not claiming to be a definitive list.)  I noticed that the kinks were somewhat skewed towards BDSM (as opposed to plain old SM).  There's nothing wrong with a bit of that sort of thing as long as it stops at the front door (I usually say the bedroom door but that would preclude use of the stairs).

There was quite an interesting kinky scene (BDSM and drugs) in The Poison Master by Liz Williams, plus an entire planet given to restrictive clothing and poisoning each other, possibly because the planet represented the Sephiroth of Geburah on the Kabbalistic Tree of Life.

I can't think of any other kinky bits in SF novels.

I had a dream once in which I was having it away with an alien, which was quite strange — it was two-tone purple and green.