The doctor had just finished examining the very attractive young girl.
Doctor: Have you been going out with men, Miss Jones?'
Miss Jones: Oh no, doctor, never!
Doctor: Are you quite sure? Bearing in mind that I've now examined the sample you sent, do you still say you've never had anything to do with men?
Miss Jones: Quite sure, doctor. Can I go now?
Doctor: No.
Miss Jones: But why not?
Doctor: Because, Miss Jones, I'm awaiting the arrival of the Three Wise Men.