Right. In that case, care to elaborate? As you've basically just tripped my pet peeve: you've said, in a roundabout way, "maybe if it was done right".
I don't want to sound rude. I'm genuinely curious as to what kind of six scenes you would deem appropriate for Skyrim.
Thats something I have been thinking about for a while. Firstly, brothels would not be a bad idea because they have always existed in most human civilizations in one form or another. Secondly, I would definately want six to be approached more casually, something that would grasp your attention for a short time and then you could get on with saving the world. I would definitely not want it to be as "available" in The Witcher, but much, much more rare (perhaps a couple of characters in the entire game). As I said earlier, Geralt was a legendary lover so it was to be expected that six would be omnipresent in that game, but that would simply not work for TES as you already pointed out.
Basically, I would not mind if some limited sixual content was added as a very rare, short time distraction, and only if the characters involved and the dialogue was interesting, fun, and original. Perhaps an odd looking adventurer you meet in a tavern some night, perhaps someone whose ultimate goals will not be unscrupulous and might involve a long chain quest after that (for example, if he/she stole something very important from you or set you up etc). Perhaps someone ultimately unimportant but with a well written character and dialogue. There are endless options really, but the basic thing for me is 1. keep it original and fun and 2. do not let it affect the game in an important fashion, just add some very rare diversity.