Carla returned, carrying a peculiar object that at first glance resembled a necklace. However, upon closer inspection, I realized the straps were too long for it to be worn around one's neck. My curiosity piqued, I craned my neck to get a better look.
Mistress held up the object, and my jaw dropped. In her hand dangled a leather collar, but instead of a clasp or buckle, it had an iron ring hanging from its center. The ring was about an inch thick and looked heavy-duty enough to withstand any struggle.
"What... what is that for?" I asked warily, my heart pounding in my chest. Mistress's enigmatic smile did nothing to alleviate my growing unease.
"This," she purred, dangling the collar in front of me like bait on a hook, "is your ticket to libido redemption." She circled me like a predator stalking its prey, her heels clicking ominously against the hardwood floor. "You see, Mr. James," she continued, her voice low and sultry, "we here at the clinic believe in unconventional methods."
My eyes remained glued to the collar as Mistress continued her explanation. I noticed small iron balls lining the metal ring, each one glinting menacingly in the low light. The hairs on the back of my neck stood up straight and heat crept up my face.
"We find this device most effective for encouraging male patients... such as yourself... to find redemption and liberation through sexual servitude," she purred, her ruby-red lips curving into a wicked smile as she traced the hard plastic of a dental tool against my swollen gums.
"Please stand up, Mr. James," Mistress purred, her voice dripping with anticipation. My legs trembled as I slowly rose from the chair, my eyes never leaving the intimidating collar in her hand.
Mistress's cold, slender fingers wrapped around my wrists, guiding me to stand in front of her. With practiced ease, she placed the donut-shaped ring against my crotch, positioning it so that my penis rested snugly through the center. A shiver ran down my spine as the cool metal made contact with my heated skin.
Her nimble fingers moved to fasten the leather straps around my waist and thighs, securing the ring in place with a series of practiced motions. The collar felt tight but not constricting, yet I knew there would be no escape once she locked it in place.
"Relax," she cooed in my ear as she tightened the final strap around my thigh.
"This is for your own good." Her words did little to assuage my mounting dread and arousal as I felt her hands work deftly behind me, securing the collar with a padlock that clicked ominously into place.
Mistress took the object from Carla's outstretched hand, her eyes never leaving mine. I swallowed hard as I caught a glimpse of what looked like an iron circle, about five centimeters in diameter, with a small frame resembling the one already around my crotch. My heart skipped a beat when I saw the long, rubbery appendage protruding from its center, measuring about 12 centimeters in length.
"Now," Mistress purred, her voice dripping with anticipation as she held up the intimidating device for me to see. "This," she said, running her manicured nail along the shaft of the rubber phallus, "is where things get interesting."
I felt my stomach drop as she stepped behind me and began to guide the tip of the phallus towards penis mouth. My body tensed involuntarily, but Mistress's grip on my hips was unyielding. "Relax," she cooed in my ear, her breath hot against my neck. "The more you fight it, the more it will hurt."
With slow, deliberate motions, Mistress plunged the rubber shaft into my urethra. I gasped, my entire body tensing as the intrusion sent shockwaves of both pain and pleasure coursing through me. The cold, foreign object stretched me in ways I never thought possible, and I bit my lip to stifle a moan that threatened to escape my lips.
Mistress's hands were firm but gentle as she guided the device deeper inside me, her expertise evident in her every move. She stopped when only a few centimeters of the shaft remained visible, the wide base nestled against my entrance.
"Good boy," Mistress purred approvingly, patting my cheek before stepping back to admire her handiwork.
My legs trembled as Mistress took a step back, her eyes glinting with wicked satisfaction. The intrusive device felt heavy within me, pulsing with each ragged breath I took. I could feel the smooth rubber hugging my every curve as it nestled deep inside my most intimate passage.
As the rubber shaft was guided all the way into my urethra, the iron ring at its base inched closer to the donut-shaped ring already encircling my penis. The two metallic rings seemed to be drawn to each other, as if magnetized. I felt a sudden pressure on my still-flaccid member as the ring began to push it inward, much like a turtle retracting its head into its shell.
"This," Mistress purred, "is where things get interesting."
The pressure increased, and I bit down on my lower lip to stifle a moan. The cold metal of the ring pressed against my sensitive skin, causing my cock to twitch involuntarily. The sensation was both painful and strangely arousing, sending shockwaves of pleasure-pain coursing through me, but my cock still hopeless.
As the two rings drew closer together, I heard an ominous click, like a key turning in a lock. The ball that connected the collar's leather straps to the iron ring slid into place, securing it tightly against my crotch. My cock now lay trapped between the two rings, trapped in an uncomfortable yet strangely erotic position.
Mistress stepped back and admired her handiwork with a satisfied smirk. "There," she purred, running her fingernails along the length of the locked collar around my crotch. "Now you're ready for your next lesson."