Mistress Narziss Labelle needs to remind her slave that he's nothing but a toy for her to play with in any way that she sees fit. She does this by slapping him. She gets him down on his knees and lets her hand fly against his face whenever she feels like it. He hasn't earned it, but she likes to do it and he has to take it. When it's over, she rewards him by spitting in his mouth.