Quote - Not sure how they ever dreamed of having this enforced, but indeed there is in the Z-Woman's license:

15. The Open Source 3D Content cannot be used in the explicit depiction or exhibition of sexual activity that is intended to stimulate erotic, rather than aesthetic or emotional feelings.

The Z-women figure has, unique feature! a reproduction tract modeled all the way up to the ovaries. No idea what was the intention of that. It looks like a separate model they had on spare. It is even modeled with a wall thickness, so inside and outside of vagina and uterus. Apparenly they wanted to give her the possibility to become the mother of a large family of figures.

The mouth, on the contrary is modeled without teeth or tongue. 

The Z-male's license has same limitations. But, while equipped with scrotum and penis, unlike the female he was not given the interior organs to make things work. Guess that was part of their extinction. ;-)

 

thats not the Project Human figures..I'm looking at the licences for PHF and I don't find that...? ( http://www.sharecg.com/v/21521/poser/Project-Human:-Female )