Yeah, later books seem like Frank Herbert was way too obsessed with sex. The idea of Honored Maitres as using sex to control humans seemed pretty misogynistic, even at the time (yes, eventually there was a guy, too). Still, I think the whole “put humanity in a pressure cooker so they explode outwards when the lid is gone” concept was pretty thought-provoking. Also the Siona project; if prescience is a real thing in that universe, it can be studied and understood, then weaponized. How do you defend against an enemy that knows where and when you’ll be?