Start stroking, once a second. The test has begun.
This test is designed to see how much control you have. A good slave would put his Mistress' pleasure before his own no matter what. He will do anything to please his Mistress, and is able to control his needs in order to serve her.
If it gives me pleasure to see you deny yourself, that is what you will do.
If you cum during the test, you will be assigned the strictest program we have available. You will be locked in chastity, and given over to my supervisor. She's the one who taught me everything I know, especially about the importance of anal domination of males during periods of denial. That happens to be my favorite aspect of my job. It's very important... It's one of the most common training techniques we use here.
It's necessary to teach man-slaves what it's like to be violated. It's like a final stamp which seals the submission, and is standard for any training program. But I thoroughly enjoy it. I love using toys on a slaves ass to make him cum, usually while I stroke their cock to the edge of orgasm again and again.
Keep stroking.