Talking about this, I'm thinking of the pet play with Yuki where you have to lie down on your back and she milks you. I loved how she made me tell her with my paws if I like it or not and when I get close. The problem is, how can the player get close if he must put both controllers in his hands to show that it should go on? Maybe it should be a continuous game mechanic that you can play with only the left controller until this event is finished? If the right controller is put away, the right ingame arm shouldn't lie on the floor where the controller is, but maybe simply mirror the movement of the left arm or be not visible at all.
I know that would change the whole minigame but if you think the mechanics through, then it really can't stay like this. Because I think the point is that you can masturbate right?