RICK
Favorite Answer
http://literatemachine.com/product/danw/otec
May be what you are looking for. It is rather hard core, and the erotica is a major part of the sci fi plot rather than simply being a book that uses sci fi for sleaze. The novel is thought provoking, and the erotica is also. Truly a rare specimen.
Anonymous
1
wisseman
Sci Fi Erotica
Jehu
This Site Might Help You.
RE:
What is the most erotic sci fi novel ever?
Pete
There are entire publishing lines now of SF/Fantasy romance novels, which you can typically find under the "Romance" section.
Joanna Russ, Pamela Sargent, Tanith Lee, Elizabeth A. Lynn, and even Ursula LeGuin have written many excellent books focusing on sexuality and relationships in SF settings.
If by "erotic" you mean sleeze, there are also soft-porn novels that use SF settings. You'd find some in "herotica" collections of short stories.
Remember though SF is usually considered a "thinking" person's genre, thus is not too focused on emotion or erotica at all.