After a couple of minutes of uneasy silence, the class did as
instructed.
"Second," the professor continued, "you must have an acute sense of
observation. For instance, how many of you noticed that I put my
middle finger up this man's anus, but licked my index finger?"
An autopsy professor was giving an introductory lecture to a class of
students. Standing over a corpse, he addressed the class. "There are
two things you need to make a career in medical forensics. First, you
must have no fear." Having said that, he shoved his finger up the
corpse's anus and licked it. "Now you must do the same," he told the
class.
