Your nipples should be getting pretty sore now! Keep turning those clothespins.
Pleasing a master's cock is obviously not all about oral pleasure. While masters who prefer women enjoy the benefit of a vagina to penetrate, masters who prefer the likes of you will have to settle for the hole you're dripping ice water from.
If there are any solid ice cubes still up there, try to shit them out - then put them in your mouth. Chew and swallow. Taste good? I hope so, because now I want you to take the panties off and put them into your mouth.
Now it's time to finger your now vulnerable hole. How's it feel? Get a couple fingers in there - if it's tricky, use saliva. Get it nice and ready for what you know is coming.