Lying down, your head between her legs, pleasing her with all the passion and stamina you got. You have to. She pinned you down. She stripped you of the few clothes you were allowed to wear, took a rope and while lying down herself put it behind your neck and pressed you down, right where you are now, binding you to that place, whispering "I will let you go when I'm satisfied enough, you know what to do". And you begin. Vanishing in her moans, her screams, her hand pressing your head down just for show, you forget how long you've worked, forget how much time has passed with you down there. You don't mind, you don't care but let yourself fall into this blissful monotonous emptiness. For it is your purpose. And you thrive upon being used.