First-year students at Texas
A&M's Vet school were receiving their first anatomy class, with a real dead
cow. They all gathered around the surgery table with the body covered with a
white sheet.

The professor started the class by
telling them, "In Veterinary Medicine it is necessary to have two important
qualities as a doctor: The first is that you not be disgusted by anything
involving the animal body.”

To set an example, the Professor
pulled back the sheet, stuck his finger in the butt of the dead cow, withdrew it
and stuck it in his mouth. "Go ahead and do the same thing," he told his
students.

The students freaked out, hesitated
for several minutes, and eventually took turns sticking a finger in the anal
opening of the dead cow and sucking on it.

When everyone finished, the
Professor looked at them and said, "The second most important quality is
observation. I stuck in my middle finger and sucked on my index finger. Now
learn to pay attention.  Life's tough, it's
even tougher if you're stupid."