It is a Medical CBT test, and I use this metal device with to his exposed cock and balls.

I am adjusting this slowly, and I see how his balls are growing by the pressure that I give to them. This metal device has some spikes, and I push them with my Hitachi, he thinks I am going to pierce his balls, and I enjoy seeing how his body reacts.

It is the first part of the test. He knows he has to take a calm deep breath, all for my pleasure.