Wrap your balls with an ace bandage (elastic wrap). Start by wrapping it a couple times tightly around the base of your balls to hold them in place. Then, wrap it around your balls, flattened and stretched fairly tight. Keep going around until you run out, and then clip it in place.
The only question is how long to leave it in place. Roll one die every minute. Once you have rolled 2 6's in a row, you may take it off. Alternately, you may remove it once you have had 6 orgasms. Whichever comes first
I'd love to hear how it goes.