It's simple: the better I think you're doing, the more clothespins I take off. Hesitate, use your teeth, or try and get away from me deepthroating you at any point, and more pins go on
A good girl knows that even if she's suspended upside down, blood rushing to her head, and being pleasured by a vibrator, her responsibility is to suck any dick put in front of her, and to suck it well