Young guy tricked into operating room for semen extraction on first andrology visit (Series 2 25 minutes)

After the operating room door closed, the air suddenly became colder. Xiao Lin was asked to strip completely naked and lie on that operating bed with stirrups. Soon, his wrists and ankles were fixed with soft straps, his legs spread wide apart, knees bent and fixed on the brackets on both sides, his entire lower body completely exposed under the bright shadowless lamp.
　　"Relax." The doctor had already changed into surgical gown, holding a slender probe with electrodes and a transparent semen collection cup in his hands. "Ordinary masturbation can't get a complete sample. For someone like you with excessive prostate fluid, instrumental assistance is necessary. It will be a bit stimulating, just endure it." The probe was coated with lubricant and slowly inserted into the anus. Xiao Lin bit his lips, feeling that thing go all the way to the deepest part, then it began to vibrate gently and discharge electricity. The current stimulated the prostate bit by bit, his penis almost immediately became fully erect, and the front end kept spitting out transparent liquid, dripping down along the shaft.
"Ah... doctor... too, too strong..." Xiao Lin's voice already had a crying tone, but his waist uncontrollably thrust upward. The doctor fixed the probe with one hand, and with the other hand held his purplish hard cock, pressing the thumb on the urethral opening lightly