>Kemonomimi (with heat included)
>Modular Android girls
>Impregnation
>Femdom
>Harems
>Incest
Okay, the first two are easy enough to include, impregnation can be part of the lore, femdom can work if the setting's a matriarchy, but I have no idea how to work in incest & harems without players getting weirded out.