You will do thousands of digital rectal exams in the course of your training, will learn the smell of melena, will check Foley's to see if there is blood in the urine, will look at mucus and phlegm and collect it to rule out pathogens, and will irrigate and debride pustulent abscesses. And will probably get all of the following splattered on you during the course of your training. That's just part of medicine.
Based on a couple of your questions, you really should be posting in pre-allo, not the residency forum. This is a board for questions involving folks a bit further down the road as you.