Once a month, I release my slave from his chastity device, to empty his balls. This is simply a rote procedure, to keep him in line, so that the denial doesn't leave him too distracted, and to remind him of the pleasures he's been missing. Milking him with a gloved handjob, I decide that the ball draining doesn't need to comprise of a full orgasm though. A ruined one will do just the job. So as I pump his cock, and he pathetically begs for mercy and a full release, I delight in my sadism, knowing I'm only going to abandon him...