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.’ For an example,
the Professor pulled back the sheet, stuck his finger in the butt of the dead
cow, withdrew it and stuck his finger in his mouth.

‘Go ahead and do the same thing,’ he told his students. The students freaked
out, hesitated for several minutes, but 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.’