The DIRTIEST, Most HILARIOUS JOKES EVER ALLOWED!!!! He tells her to take off her pants, she does, and he starts rubbing her thighs. The doctor begins rubbing her breasts and asks, "Do you know what I am doing now?", she replies, "Yes, checking for cancer.". A lady goes to the doctor and complains that her husband is losing interest in sex . The doctor gives her a pill, but warns her that it's still experimental. He tells her to slip it into his mashed potatoes at dinner, so that night, she does just that. About a week later, she's back at the doctor, where she says, "Doc, the pill worked. Absolutely hillarious doctor one-liners! Large collection of best doctor one-line jokes rated by viewers.