Just to let you know the futa isn't getting disabled when turned off. Not sure if it is a bug or not fully implemented yet.
Viewing post in Debauchery in Caelia Kingdoms comments
at the moment that affects mostly history characters. A bunch of the girls in the game are actually futa to begin with, but with this switch you don't get that content.
Since you can avoid enemies (either flee or dont surrender or get your way with them) this as less important, although in the future I will make that enemies won't spawn as futa either (probably for october's update)