Yes the mill 4 figures would work best for this, there are any number of detail morphs that will work with out issue; I assume from what little I have seen, I mean while checking RenderE{yes I am regestered there  }. But with out proper lighting and smooth animation an intimate scene might as well be flippage porn lol

My advice on intimate lighting is short drop off. Start with 100% drop off at 1m. Lean it to the red/orange, make it warm. Holly is much better at this sort of lighting then I am.

 

Sorry, not a big advocate of "PoserPorn". But the biggest issue I have seen in the few animations I've stumble across, is the characters are rigid and weightless. Good animation takes more then just the motions.

 

 

Did you ever get a school book where something was drawn in the corners so if you flipped through it seemed to aniamte? Flippage animation lol