You need to be aroused, that have nothing to do with Top rank. Sometimes that means you have to change to seducing stance to make actions to arouse yourself. Also because of that you might miss some top actions. And also some actions hard to do since your enemy and you should be in specific stances. As example, enemy rarely goes on all fours but you can do some top actions in this state.Since this thread is insanely long (by my standards) to sift through, can anyone tell me how to engage in battle sex as a top? I got into it literally once while fighting against a Brigand after tearing her bottom armors off, full nelson, takedown then grappling and holding until the "penetrate" prompt appeared. Is it just about luck BS? I even used the "Encounter" cheat option to buff my Top rank to 10.
As a example of how you can get aroused in battle without seduce stance, try exhaust enemy in the takedown stance then quickly stand up, most enemies will be on the ground for one more turn. If they are face down you can kick them to make them face up, then you can sit on their face until you're aroused.
Also note that not all enemies can be dominated like Golem IIRC.