1. A person imaging apparatus comprising: an information storage device for storing informational data, which represents a number of items of information such as moving pictures, still images and audio, in correspondence with probabilities that a person will be caused to laugh; an information presenting device for presenting one item of information, from among the number of items of informational data that have been stored in said information storage device, to a person who is the subject of photography; an image sensing device for sensing the image of a person and outputting image data representing the image of the person; a first imaging control device for controlling said image sensing device in such as manner that the image of the person is sensed in response to presentation of the information by said information presenting device; a laughing-face determination device for determining whether the image of the person represented by the image data that has been output from the image sensing device has a laughing face; and a first information updating device for updating probabilities that have been stored in said information storage device in such a manner that the probability corresponding to the information that has been presented by said information presenting device will be raised, updating being performed in response to a determination by said laughing-face determination device that the image of the person has a laughing face.