*level 2 : 30 sec*
As for their balls, there is no question of emptying them. I took pleasure in imagining them teeming with sperm, swollen under the effect of the accumulation of seed. They had to contemplate me every day, without being able to touch me, but I always made sure that they saw me in my best light. I loved to excite them, to stroke their member with the tip of my finger when I passed by them, without them being able to do anything.
And if one of them masturbated during the night, the device in their testicles spotted it immediately and started to work until one of us stopped it. But we didn't always want to, so we gagged him and locked him in a soundproof room. Most often he would go mad or die of pain.