Specifically, sex skills let you perform actions with more chance of success in nonconsensual scenes, and increases their arousal gains. Promiscuity is what allows you to steer actions in consensual scenes. I think penetration is at promiscuity 5 iirc.Thanks matey!
That's sex stuff sometimes become rather complicated.
Now if your partner decides to do something, there's sometimes a chance to cancel it(Usually a pull away option). There's also an ask to not do x action. There is a success chance on this, and your partner might decide to ignore you and the scene will become nonconsensual at that point. Sometimes, if your partner decides to move into a position its a hard block on some things(You can't leave a facesitting stance and change to missionary or doggy for example). So all your proactive actions would be limited to that framework.