I have my slave tied up and helpless at my mercy. Hooded for extra sensory deprivation, all he is capable of is struggling against my ropes while I play with him for my own pleasure and amusement. While he wiggles and moans I can use him as human furniture, resting my glorious feet on him, or take advantage of how accessible his ass is to be spanked, sit on him to use as human furniture, or even sit on his face and overwhelm him. I can even play with him rolling his body around on the floor. He is completely under my control. That's what it means to be tied up by your Mistress - complete surrender to my will and pleasure