A beautiful, voluptuous woman goes to see a gynaecologist.  The doctor takes one good look at this woman and his professionalism is a thing of the past. Right away he tells her to undress.  After she has disrobed he begins to stroke her thigh.

As he does he says to the woman, "Do you know what I'm doing?"

"Yes," she says, "you're checking for any abrasions or dermatological abnormalities."

"Correct," says the doctor.

He then begins to fondle her breasts.  "Do you know what I'm doing now", he says.

"Yes," says the woman, "you're checking for any lumps or breast cancer."

"That's right," replies the doctor.  He then gradually proceeds to having sexual intercourse with her.  "Do you know," he pants "what I'm doing now?"

"Yes," she says. "You're getting herpes."