A bound slave squirming in anticipation as his mistress teases his prostate with a new device. She starts gently, rubbing and fingering the sensitive gland, making him gasp and moan. The slave's hard cock bobs with each touch, pre-cum leaking freely. The mistress increases the intensity, using a starpon to stretch and massage the prostate, bringing the slave closer to the edge. Finally, she milks his prostate, coaxing out a massive cumshot, as the slave screams in pleasure and relief.