As much as I would love to see your idea being realized Craban, it would be an enormous undertaking and since Shark is working alone except for the translation, I don't see it happening...
That is, unless you happen to have any experience in 3D modeling, animation, programming and all the other details needed to make this happen.
Right now, the most advanced 3D sex simulators are the ThriXXX (virtually jenna etc) and Illusion (sexy beach etc) and they definitely lack in the RPG department.
A blend of, say, Lessons of Passion and hehe, Crysis, would be super!
Edit:
Just read your introduction Craban, seems like you DO know about software engineering.
Then you know how much work it takes to develop something like this.
I was involved with a mod for Battlefield 2 back in the day and that experience told me that it's a job and a half... To say the least.
I also saw you're into MMORPG, then may I suggest Red Light Center,
http://www.redlightcenter.com/Sites/RLC/flashtour.aspx? It's not free and it's not an RPG environment per se, more like cosplay but maybe you'll like it...