The doctor, a handsome, broad-shouldered man, watches as his young patient undresses, his eyes widening at the sight of the boy's hardening cock. He approaches, his voice low and commanding, "Let's see how you're doing." He runs his fingers up the twink's thigh, pausing at the base of his cock. The boy gasps, his cock twitching. The doctor smirks, "It seems you're... excited." He wraps his hand around the boy's cock, stroking it gently. The twink moans, his hips bucking slightly, "Doctor, what are you doing?" he pants, his voice laced with desire. The doctor leans in, his lips brushing against the boy's ear, "Just checking your... progress."