1st year students were attending their 1st anatomy class.
They all gathered around the surgery table with a real dead dog.
The Professor started class by telling two important qualities as a Doctor.
The 1st quality is 'Never be disgusted for anything about the body!'
He inserted his finger in dog's mouth then tasted it in his own mouth.
Then he told them to do the same.
The students hesitated for several minutes.
But eventually everyone inserted their fingers in dog's mouth & then tasted it.
When everyone finished, the Professor looked at them and said: The most important 2nd quality is 'Observation', I inserted my Middle finger but tasted the Index finger.
The Moral of the Story: Learn to pay attention.