Gor- sort of a sci-fi (uh...ripoff is too strong) scifi series of novels (looong series, I think it got up to #27). They were done from the early 70s through possibly the early 90s. The premise was there was a counterpart to Earth opposite us, but in the same orbit. Aliens controlled it (big buglike, but semi-benevolent), and kept technology from advancing out of the dark ages. Tarl Cabot, the hero, came from Earth, and wound up going through all sorts of adventures. Swords, sex, swashbuckling, and philosophizing about the 'puny' Earth people. There's a wonderful parody of it out there  on the web, actually in one of these forum posts a while back, about a plant being cared for, 'gor style'..;)

The 'troubling' aspect of it was that slavery was condoned; women were 'used' (Kajiras), and men just as work drones or something (Kajirus). The first 5 novels weren't bad, but you could see he was cribbing 'John Carter of Mars' a bit. After that, it became soft bdsm porn (not detail-oriented, but you knew what was going on). You'd start a chapter, look for the words "I wil never submit" and know it was safe to thumb to the next chapter..;) In my defence, I bought nearly all of them in used bookstores..;) Another tipoff was "Curiosity is not becoming in a Kajira. You might be beaten for it"

They actually made 2 movies of them back in the 90s (which affected Gor fans the same way Star Trek Movie 5 affected Trekkies/Trekkers...;) It just proved what I call one of the laws of Kink; the more obssessed the fethish, the longer the series will last. Some online readers will know what I mean..;)

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)