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solo nude man, kneeling on padded bench, nude, bright clinical room with white walls and fluorescent ceiling lights, industrial-grade penis pump attached to groin with transparent tube, silicone sleeve at base, engorged red tip visible through cylinder, strained expression with gritted teeth, veins bulging on arms gripping bench edges, sweat on forehead, low angle shot, harsh overhead lighting creating deep shadows, sterile atmosphere, intense arousal, medical-grade equipment, close-up on penis inside cylinder,