Time to start training a new slave in my dungeon. Its not enough that Ive locked him away, stolen his life, his freedom, and restricted his food and water, but I want to restrict access to his cock as well. From now on he will be placed on a strict masturbation schedule locked-up in chastity. He is only released when it is time for his scheduled masturbatory emission, which is becoming more and more in frequent. I tease him until I see his swollen cock painfully squished against his cage, then unlock his cock, and leave him to masturbate alone in the dark.