Black stockings, collar and chain are allowed. No other clothing is allowed. Start by using the chain links to stimulate your nipples, making them as hard as you can. Then you must use the chain on your pussy, running the links up and down your clitoris until it becomes hard and your pussy becomes very wet. At this point use the dildo of your choice, but only in your ass, not in your pussy (I'm being generous, you can use lube). ride the dildo, fucking your ass and continuing to rub your clit with the chain until you cum. At the end you should lick the juice of your pussy off the chain and thank me for my instructions.