i have n't yet spoken to him personally , but from what i see , dr. hunter really is a doctor , and seems even to have some vague notion of germ theory , owing to his having trained with john hunter , one of the great men of medicine ( on the chance that roger will be reading this , i will refrain from telling you the manner in which john hunter discovered how gonorrhea is transmitted-well , no , actually i wo n't : he stabbed himself in the penis with a lancet covered in pus from an infected victim and was deeply gratified with the results , according to denny hunter , who recounted this interesting incident to your father while bandaging his thumb , which got squashed between two rolling logs-do n't worry , it is n't broken ; just badly bruised ) .