Slave has been sent to me for his periodic milking by his usual Mistress - he's been locked into chastity for nearly three months now and is desperate for release. I begin by hooding him, then bend him over a kneeling rack. I tie him down firmly, securing his arms and then tell him I'm going to be stretching out his ass to begin with. I stretch him open with my fingers, sliding them over his prostate, then put a large plug inside him. I keep the huge plug in place with a belt, and tie him down further, so he's helpless and I can continue using him as I please.