Well, I don't see a problem with some conversation that hints at their services, but why do you need to have animated six in a video game? Can't you just go rent porm, or use your imagination? I think it's a little bit absurd to have cartoon six in a game. But I guess that's just my opinion...
By all means I don't want it animated lol! I want this option to be there like in Fo3 or The Witcher, for role playing sake not to see naked argonians lol. It's a matter of world coherence, for me its the same with carriage transport vs fast travel. Can't I just use fadt travel and imagine I used a horse or a silt strider or something? Of course I can, but its way cooler to actually see a carriage, talk to the driver, pay, and then its the same with fast travel: loading and voila, you're there. But it's more alive, more believable, I don't know... it just makes sense. Same with prosttutes, of course they can just be a few dancers in a delight house, but I prefer to have the options to go further and talk, negociate, pay and [censored] them, it's not important that the screen goes black, it's the role playing involved before and after: the choice, the talk, the money, the gain or loss of reputation...