e.g. He inserted his finger in dog’s mouth tasted it in his own mouth.
Then he said 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. Now learn to pay attention.
Life is tough but it’s a lot tougher when you are not paying attention