You seriously think there aren't Slut builds, that let you decide most of the time, what kind of Sex Position is happening?
Yes. I absolutely believe that. Because
that's how the game works.
If an enemy uses a move that engages a sex-scene, there's more or less no way to avoid it. These moves begin happening whne her desire is high enough, and cannot be stopped. Even taunting them is no guarantee.
You can't stop them from doing it, you can't block it except by having too many clothes on (which are easily stripped off regular attacks once you have a couple of passives that lower your strip resist) and you can't change the scene once they've engaged it.
The best you can do is hope to act first.
So there's a kernel of truth when you said that Agi helps, but it's not enough because sometimes you need to so something else on your turn, like raise desire or deal with an undesirable enemy.
Some of the scenes I want can't be engaged by Karryn at all, so all I can do is hope that the enemy I want to act acts first and uses the skill that I want them to use.
This is not "Player controlled" and it's not engaging gameplay. It's tedious busywork.