The doctor walks into the examination room. There is a very beautiful woman lying on the table. The doctor begins his exam, and lets his hands wander. He strokes her neck, and asks "Do you know what I'm doing?" She replies "Your checking my lymph nodes."
He moves his arms down, unbuttons her shirt, and fondles her breasts. "Do you know what I'm doing?" he asks. "Your checking for breast cancer" she replies. The doctor figures since the woman is obviously depressed and being very complacent, he'll try his luck.
So he pulls it out of his pants, takes off the patients skirt, and goes to work. "Do you know what I'm doing?" he asks. "Yes," she replies. "Your getting Gonorrhoea, thats what I'm here for."