Talk:Catgirls/@comment-24053170-20200321093530/@comment-444327-20200326135245

I'm not sure about the logic that a catgirl that lives with her human owners means that she adapts to produce children with them. Dogs have been domesticated for a very long time but that doesn't mean we can now produce offspring with them. They're a completely different species, but they can breed with other canids. At least until you neuter them.

It's probably based on the idea that interspecies relationships won't produce offspring due to incompatible DNA. Although cross-bred species between similar species exist in reality such as the liger, which is a lion and tiger hybrid, or the mule, which is a donkey and horse; such hybrid species can have health problems and reproduction for the hybrid species is a rare occurence. They probably just opted to make humans and catgirls incompatible for producing offspring despite catgirl physical resemblences to humans just to make things easier, and so the story doesn't go too dark by trying to tackle that topic.

It also gives the 18+ sequences an excuse to fill them with babygravy without consequence.