I like True Blood and Spartacus, and if I hadn't read the books I might not be such a purist with Game of Thrones.
And this is the crux... for me at least. I've enjoyed True Blood and Spartacus quite a bit and the sex just comes with the story, albeit some of it is gratuitious... But I don't mind it since I was not previously emotionally invested nor intellectually tied to the written story.
I've confessed in another thread that I do not consider myself a prude, but I certainly must be compared to all my fellow posters here.
Spartacus is pure fantasy. Violence, sex, lies, blood, schemes, death, despair, vengeance... It's all done in a highly stylized period piece. It presented itself as soft porn so that is the term under which I came to know it.
True Blood is a bit more interesting. Is the show gratuitous for gratuity's sake? Or is the show meant to be gratuitous as a reflection of contemporary society? The themes of the show, I believe, are there to parallel societal issues of acceptance/bias, male/female roles, power, religion, and how we deal with the marginalized people in our midst. Sometimes I think the sex in True Blood mirrors this... Do we revel in hedonism as the Maenad? Should we emulate Lafayette, Bill, Sam, Eric or Hoyt? Any of them? Jason's unbridled nature has gotten into no end of trouble...
Since I am fine with these shows, I figure that most people who've not read AGOT are fine with the presentation of sex in the show. They're not tied to a previous version.
The purpose of the scene was to reveal more of Littlefinger's character. From what he does in the later the books, I thought it showed rather well the sewer that his mind is. As stated elsewhere I feel there is far too much hoopla about the so called 'porn' in the show. It is fairly mild to be honest.
Yes, the scene was to show Middlefinger's motivation... power. They could have showed only Baelish, with the women off screen, teaching them what he wanted. It would have been a chance to see another facial expression from him. His first and only expression has been aloofness until his smile from betraying Eddard. I wonder if the director has ordered Aiden Gillen to do this or if he has any acting chops at all. Middlefinger is a wonderful character and they've done nothing with him... That scene and his confession to Roz was a lost chance to really get glimpse past the exterior.
Ursa, mayhaps Baelish said this to Roz to see her reaction. Does he think she knew Catelyn? Or does he think Theon and company have told her juicy rumors?
As for the Roz character... I think her inclusion in the story is to provide a peek at the life of the commoners of Westeros.
Mouse, I think the implication from two males would have been that Baelish enjoys a gay lifestyle. Presenting him in this light would be a serious departure from GRRM's story. But that's not what you're getting at, is it? Let me say that I left the room to refresh my drink during Renly's shave...