PAY ATTENTION, PEOPLE!

In a forensic science course at a leading university, the professor had brought in a dead body for examination on the first day of class. He said to the class, "Now, one of the key points of an autopsy is finding out all that there is to know about the body in question." With that, he stuck his finger into the anus of the deceased, pulled it out and proceeded to suck on it. After everyone in the class turning away in disgust, he stated that he wanted everyone to do the same. They reluctantly adhered, and when the entire class was finished, the professor added,"Now, the second key point is observation. If you noticed, I stuck my index finger in the anus, but I sucked on my middle finger. Pay attention, people!"