Fire Goddess
Well now are you still rock hard? If not get there; ball-crushing always causes men to wilt. Now tie your sack to the chair so that your balls are exposed by the loop of the knot. Make sure it's tight. Slave, you will go and get the following items while dragging the chair behind you by your balls. You may not use your hands to help drag the chair. I hope you have to climb some stairs.
First find a wool glove (a face cloth will work) and put it in a fridge after soaking it in cold water. Then get me a black marker or pen, something like a solid piece of doweling (about 14" long) or a hard wood ruler, and some icy hot. If at any time you start to lose your hard on you will immediately stop, get on your knees and edge once while picturing your goddess. When you return you will write "Vikki's" across you shaft and draw a crosshair on your balls. That is a light price for what you are about to see slave.