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 sam e 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.'