You're late.

 — You're late! — Her voice sounded dry and stern. The flirtatious white robe accentuated the beautiful butt and slender legs of my urologist, Evgenia Sergeevna..

 — But you understand, traffic..

 — You are the last appointment today. And to perform the necessary procedure, I will have to miss an event I was invited to! Well, I'll have to punish you for that. Undress.

I took off all my clothes and was left in my underwear.

 — There's no one left in the department. No need to be shy. Take off your underwear, sit on the couch.

She walked around behind me, brought my hands behind my back, and clicked on handcuffs.

 — This is so you don't think

I'm playing with you.

She took a chain with clamps on the ends from a desk drawer. She approached me, tickled my nipples. They immediately hardened. One by one, she pulled each nipple and attached the clamps. I felt a sharp pain—the clamps were quite tight. She pulled my head to her chest:

 — There, there… Bear with it, good boy. It will get easier soon.

And indeed, the sharp pain subsided, leaving a slowly growing, lingering pain, like a soreness… But that was bearable, though every movement of the chain brought pain. She took the chain and led me to the wall, which had small hooks screwed in at different levels. Evgenia Sergeevna raised the chain as high as possible, I cried out in pain and stood on tiptoe. She hung the chain on a hook so that my heels barely touched the floor. My body stretched taut like a string, my cock tensed and stuck out like a gun barrel. Evgenia Sergeevna took my cock in her hand and said thoughtfully:

 — For greater effectiveness, it would be good to achieve a full erection..

She rummaged in the desk drawer and pulled out something resembling a leash with a small collar. She put the collar on my balls and fastened the strap tightly, then threaded the leash between my legs. She gave the leash a slight tug, and the skin on the head began to pull back. Then she gave the leash a sharp jerk, and I thought the foreskin was about to tear… I groaned.

 — So, dear, not a sound. You're having a prostate massage today. But if you squirm and resist here, I have just a few of your favorite catheters for you, — She smiled mockingly and spoke in an intentionally affectionate tone.

 — But Evgenia Sergeevna!… — I exclaimed..

 — Be quiet, I prescribe the procedures.

I had no choice but to resign myself. Meanwhile, my nipples were already hurting seriously. Evgenia Sergeevna seemed to sense this.

 — Does it hurt? — she asked sympathetically.

I nodded my head.

 — Poor thing, — She took me "off the hook" and with a careful, quick movement removed both clamps simultaneously. My whole body jerked, but I held back from crying out.

 — Tired, little ones, — she said mockingly, smiling, — Need to knead them a bit — and she began twisting her fingers into my nipples with slight pressure.

I went mad with pain and writhed with my whole body, not daring to make a sound.

 — Now we'll attach them more comfortably… — I tensed up and trembled, preparing to experience the pain again, but Evgenia Sergeevna suddenly changed her mind and said:

 — And what about the cock? And indeed, the erection persisted, but clearly didn't qualify as "rock-hard"..

She went to the desk and took a ruler. She squatted down and pulled the leash downward. The head was exposed and she struck the frenulum sharply. The cock jerked as if alive. I bit my lip.

 — How patient. So, if I hear even a sound — eight strikes with the ruler! Understood?

I nodded silently.

 — Right, where were we? — she took the chain and deftly attached the clamps perpendicular to their previous position. I remained silent, glancing pitifully at my tormentor.

 — On the couch! — the doctor commanded.

I knelt on the couch.

 — Bend forward, touch your cheek to the couch.

Having no support, I literally collapsed forward.

Evgenia Sergeevna attached the chain to the front part of the couch, spread my knees as wide as possible, and fastened the leash to the back part, thus stretching me by the nipples and balls. My cock touched the couch sheet, lubricant oozing from the canal.

The doctor put on a glove, lubricated a finger with Vaseline, and said:

 — Breathe deeply…