In a clinical setting, InstitutionX presents a grueling prostate training session. A powerful fuck machine, equipped with a realistic strapon, teases and probes the slave's anus, stimulating his prostate with unyielding precision. The machine's slow, steady rhythm drives the bound man to the edge of orgasm, only to cruelly withdraw, denying him release. His cries of pleasure-pain fill the air, his feet twitching as he struggles to hold back. The machine's relentless assault on his prostate is a masterclass in edging, a brutal yet tantalizing dance of control and submission.