"Grandpa, you're not supposed to do that," the patient protests weakly as the old doctor, his pervy eyes gleaming, positions her for a doggystyle fuck. "Is it serious, doc?" she asks again, her voice trembling with a mix of fear and excitement. "Very," he growls, his old-man cock throbbing with need. He buries his face in her pussy, his tongue exploring her folds, savoring her tight, young cunt. With a grunt, he enters her, his aged hips moving with surprising vigor as he pounds her, his worn-out body finding new energy in her youthful flesh.