Mistress is easily amused, especially by heartfelt groans of her bottom as she mistreats him. & since Mistress loves to laugh, she'll mistreat him more & harder. Mistress just loves to abuse slaves. It seems to be her hobby! The slave very properly thanks Mistress after each kick or blow she delivers, however maybe Mistress should be thanking her slave for such amusement. What fun it is for her to kick him in balls as we see her doing. The harder Mistress kicks his hot rocks, louder he groans, & louder he groans, New Mistress laughs.