I will make it simple and fast, that they implemented an option to modify more aspects of the npc you can find, because although there is an editing system at the beginning, there are things that are skipped or unfinished.
an example of this is the fact of not being able to modify the aspect of the male/female body, maybe this is fixed if you put that they are healthy people, but I would like to give better specifications than leaving it just to chance, because normally the men come out all very muscular, and only a couple of women come out with good bodies.
the same happens for example with the thickness of the penis, you can edit the length, but the thickness takes away aesthetics, because I have seen aberrations of a man with an anaconda of 30 cm and with 2 cm of thickness, what is that, a worm?
PS: all I try to say as a form of advice for the game, not to make fun or to give a bad name to the game.