Mummify your partner make them stew for hours wondering what you will do with them. Start with there arms by there sides before they realise what is coming. Then the top leaving the breasts expossed. Put in the red lips gag to hold the mout open then cover the whole of the head. Poke a finger into the gag so you know where it is for your plans. Then the legs leaving the pussy or balls expossed. Now lie them down preferably in the toilet. Then you can begin their torment by nippling them or playing with the genitils. Only for a short time and come back maybe after 30 minutes and repeat your tease. Now when you want to piss open the mouth piss and reclose. Keep repeating this or invite your friends to piss.
Later you can ask your slave could he tell the different piss. I fhe cannot you will mummify them again, until he gets it right. Of course he will always be wrong an excuse for limiting there sex. As a woman you can use a dildo and have an orgasm and when wet fuck deep in his throat.
