I thought this was good

[Sangoma]

First-year veterinary students were attending 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 an animal's body."
For an example, the professor pulled back the sheet, stuck his finger into the butt of the 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 butt of the dead cow and sucked on it.......followed by assorted gagging, retching and spitting.
When everyone had finished wiping their faces, 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 but it's even tougher if you're stupid."

 

[Humphrey]

I heard the version of this with a human corpse in an anatomy lecture.

 

[JohnC6]

I thought it was going to say that the students did exactly what he told them to do. Finger into the cow and then into the professor's mouth

It reminds me of another incident. A professor walked into a lecture room and was new to the students and said.."I'm professor McDonald and I want to be known as such. So, they called him... ''such'

 

[ancient_mariner]

The another version involves medical students and a beaker of urine. They are encouraged by their lecturer to observe and copy what he does, and then note the slightly sweetish taste.

 

[Norkie]

My chemistry teacher Mr Higgs did that to our class when we were making salt from a solution, clever chap

 

[Suvv]

The another version involves medical students and a beaker of urine. They are encouraged by their lecturer to observe and copy what he does, and then note the slightly sweetish taste.

That's the version I heard.

I used to do it to apprentices telling them that you could tell the difference between mineral oil and vegetable oil as you could taste the salts in the mineral oil!