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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."

Setting 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. But eventually, each took turns sticking a finger in the butt 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 is tough enough, and it's even tougher if you don't watch what you're doing".