Trust me Bowden,
the most stimulating thing about the sexual scenes in FSOG will be the sensation your fingers get flipping to the pages. And it you're into the BDSM, you might be lucky enough to get a papercut along the way...
Hahahaha! I read the entire series (I deserve a medal or some heavy drugs at least for that effort) and it was... Honesty, I can't even tell you what I thought under the Bambi Principle: If you don't have something nice to say, don't say anything at all.
I have absolutely nothing nice to say.
And I have read plenty of good BDSM, so it's not a genre thing.
Trends in books, like in fashion, have no rhyme or reason to me. I've seen some crappy styles on people that are all the rage, just like I've read books that have so much WTFery going on, it makes me dizzy. This is such a case.
Ah, if only I could write something that caught fire like that... Preferably representing the genre a bit better.