Students at a Medical School were receiving their first anatomy
class with a real dead human body.
They are all gathered around the surgery table with the body
covered with a white sheet. Then the professor started the class by
telling them, “In medicine, it is necessary to have 2 important
qualities as a doctor: The first is that it is necessary that you
don’t get disgusted.”
The Professor uncovered the sheet, sunk his finger in the butt of
the dead body, withdrew it, and then stuck his finger in his mouth
and sucked it.
“Go ahead and do the same thing” he told to his students.
The students freaked out, hesitated but subsequently taking turns.
They sunk their finger in the butt of the dead body and sucked it
after withdrawing it.
When everyone finished, the Professor looked at them and told
them: “The second important quality is observation. I inserted my
middle finger and sucked the index. Please pay attention students.”
Sarap… 
