While the idea of someone spending days/weeks modelling human genitalia is weird, every other medium has gotten over nudity without hellfire raining down. Strange as a picture of a dead hooker with her vagina on display is, this topic only exists because of the frigidness around nudity in video games and OP's reaction to encountering this rarity so randomly.
As for the actual story here of Sony handing out suspensions, sounds like they really need to work on "child locks", or whatever you want to call them, and let adults post things that might include nudity. Still, if it's in their ToS as of now, stupid as the South Park parody levels of "eek a penis/vagina" are while violence is a-okay, you did violate them - not to say violence should be some be all, end all of ratings, but it's never going to make sense to me that genitalia is the forbidden fruit.