I read some of Norman's books in my late teens and even then was left thinking the later books were wrong.
The Gor series of books started off well enough (for the first three or so) but quickly degenerated. I read a few more hoping they would return to the earlier style, but they just seemed to get worse and worse, until I finally gave up.
Looking back they are probably the worst fantasy novels I have ever read (that is saying something, given the fact I have read a lot and there is an awful lot of trash out there), the 'all women are sex slaves' angle was truly appalling. The fact the series went on forever (well 26/27 books) is baffling (to use one word).
The Conan stories used sensuality and sexual elements to the stories as part of the overall whole, which I see no problem in. The main basis of the stories was Conan and how he overcame some truly weird (and evil) opponents. That there was a sexual element added colour to the stories (and often was crucial in the plot, a kind of damsel in distress element was often in there). The woman characters were as often as not pretty strong willed types.
The main basis of the Gor stories (at least after the first few) always seemed to promoting the women as slaves 'theory', with a fantasy story tacked on. I discussed them with a friend at the time who had quite seperately began to read them, and we agreed they were okay to begin with but Norman's obsession went OTT. (Actually he said this and I agreed). The female characters were uniformally meek, subservient and pandered to the male lead (who is so unremarkable I have forgotten his name).
I am with Sgt Zim with this one, Norman and his novels are probably best left largely forgotten (which is, to a degree, a shame, as the first few were okay and might have made a decent RPG setting). The Monty Python bit is spot on.