"Are You Paying
Attention?" A professor is giving the first year medical students
their first lecture on autopsies, and decides to give them a few
basics before starting.
"You must be capable of two things to do an autopsy. The first
thing is that you must have no sense of fear." At this point, the
lecturer sticks his finger into the dead man's anus, and then licks
it.
He asks all the students to do the same thing with the corpses in
front of them.
After a couple of minutes silence, they follow suit.
"The second thing is that you must have an acute sense of
observation: I stuck my middle finger into the corpse's anus, but I
licked my index."