Request: pain vs pleasure competition

I have this fantasy about being locked in some sort of device like a double-sided glory hole with my cock sticking out one side and my balls out the other. Two women are brought in and each pick a side. The rules are as follows:

* There's a half hour timer running
* The one on my dick wins if I orgasm before time runs out and can stimulate me with hands, mouth, pussy, etc
* The one on my balls wins by preventing my orgasm until time runs out without causing any permanent damage to my testicles

There's a third woman present who keeps track of time and watches for violation of the permanent damage rule. There could be a prize for the winner, but all of them are enjoying themselves, including the judge when she's thoroughly examining my nuts.

In my fantasy version I don't last the full half hour.