There's no reason you shouldn't be able to keyframe the various positions of
the kama sutra into a skeletal animation system.  Add decent skinning
software for realistic skin deformation and kinematics for handling the
vital jiggle and bounce you've got the classic hump.  Now throw some random
numbers at the animation speed so it's not just clockwork pumping.  Some
hand-animated or motion-captured "position change" sequences allow you to
build a scene.  Nurb particle simulation gets you the liquid simulation you
need.  Now dress the set; anywhere, anytime, real or imagined, it's just
ones and zeroes.  And dress the figures; you want Clinton and Lewinski,
Ranma and Akane, or Akbar and Jeff, it's just mathematical figure
deformation and texturemapping.  Get a library of figures, sets, and
sequences and run them through a randomizer and you can turn out an entire
CG gonzo porn tape with the click of a mouse.

And the Playstation 2 has the graphics horsepower to do it all in real time.

ISAGN.

-S