Funny Dirty Joke

A young woman goes to see her doctor.
Doctor says, how can i help you today , she replies i have a nasty rash on my body i got on holiday-i'm not sure what it might be.
Doctor tells her to climb upon his table and lay on her back and remove all her clothes, he begins to touch her legs, he asks what am i doing now, and she reply's you are touching my legs doctor, he says correct, he then begins to caress her breasts, and he again asks what am i doing now, she reply's, you are fondling my breasts doctor, that's correct says doctor, the doctor then begins rubbing his penis against her, the woman says is this necessary doctor, he reply's yes it is to clear your rash, he then begins to climb on top and penetrate her, and says what am i doing nowwww, to which she reply's well doctor your catching syphilis which is why i came to see you in the first place.