As far as I remember it started out as a way to add back the incest content that was taken out of the game due to Patreon rules. They dabbled in outright removing futa content I think? But some people didn't want that trade off so there was talk about just letting you remove dicks from futas and reversing some other game decisions the mod dev thought was stupid.
What part of only today you not understand?_?
No you don't need balls you'll have a seminal internal pouch but that reduce sperm capacity (still quite high) without them.
It adds in-line images to certain scenes. These images can be expanded by clicking on them if you want a larger view.
You can get a zil female pregnant. After that there is a repeatable encounter of the pregnant zil during which you can talk to her, suckle her breast, take a nap or have sex with her. No interaction with her offspring that I can think of.
She takes kid with her. The only Zil kids you can get are from the prostitute Zheniya in Tarvos. Or get pregnant yourself.
