I, for one, was surprised to discover that there is a non-negligible number of these, even among those who would have called themselves feminists. 
Also: It is repeatedly stated that there are about forty free women for every slave on Gor. This, though, is on a par with saying that Nottingham had a thousand faceless peasants for every Merry Man in Robin Hood’s entourage: they’re not the ones that make for entertaining stories.
It’s there. The driving need for the men of Gor to dominate everything around them has some sexual aspects I think. Talbot’s physical dominance of the female lead is mirrored in his physical dominance of his male friend.
Interestingly there are some that take the Gorean lifestylevery, very seriously.
Though I never read any of the Gor books, I did want to share this little anecdote:
I started playing D&D in high school, in the early 1980s. Back then, Dragon Magazine (published by TSR, which also published D&D) contained a book-review section.
In one of the very first issues of Dragon which I ever purchased, the reviewer covered one of the latter books in the Gor series. I mostly remember the review for the headline: “Norman Gors Us Again” (the review largely echoed what’s already been said here about the series). I’d not heard of the Gor books before reading that review, and decided that I really didn’t want to or need to read them, either. 
Until Norman ran off the rails on the BDSM themes the books were actually pretty decent fantasy adventure.
The earlier volumes were rather enjoyable. Kind of an Edgar Rice Burroughs feel. I don’t own the original editions, but I have the first 5 volumes translated into Spanish (Argentinian translation - Vosotros. Yuk.)
Did that member who was into bondage porn get banned? Why else would he not be riding his white stallion, wearing a latex body suit and with a rubber ball in its bit, into this thread to support Norman?
Well, the thread linked to in this one was started by him and it says “guest” under his name, not “banned”. I’ve noticed he hasn’t posted lately and wondered the same thing until I saw it.
His last post was on September 6.
And he appears to indulge his predilections elsewhere these days.
I remember when Dragon ran stats on various fictional characters (to help integrate them into the game). Tarl Cabot was given an alignment of Lawful Evil, and the letter columns for the next few months were blistering with fanboy scorn that he was characterized as evil. They wanted him to be more Lawful Neutral, but the argument that he promotes slavery (which is Not A Good Thing) seems to have won.
You’re not telling me anything I don’t know. I’m not a lifestyler myself, but I’ve long been on first-name terms with one or two. 
IIRC he seemed like pretty good guy. Aside from the BDSM stuff he was pretty solid SDMB member that participated and helped fighting ignorance-wise where he could.