The Poocademy

That morning, there was a rush in the Poocademy as usual.
The famous scientist Professor Poopoof, the inventor of the science of poology, was also making investigations for his new research.
In fact, the idea to examine the poos came to his mind during a world tour. (The professor always had questions to answer in his mind.)
Poopoof discovered a common feature of all humans and even animals: pooing. Moreover, although everyone was pooing, no poo was like the other.
***
Finally, it was time to investigate. With its laboratories, materials and technological equipment, Poocademy was ideal for poocademic studies. Poopoof and his team began their first research.
At that moment, a small, round poo fell into the toilet and made its way to the Poocademy.
"Look, this is Poohard. He came to the Poocademy reluctantly and with great difficulty. Can you guess why?" asked the professor.
"Dear Professor, I think Poohard is a little dehydrated," said one of the poologists. The professor responded, "Yesss! If the human body doesn't get enough fluids, their poo will be like Poohard's."
"Therefore, one should drink plenty of water, and consume a lot of fruits and vegetables that contain fifiber," he added.
***
"Oh, look at that, what a watery poo!" It was Pooflflush who came.
"Ehehehhehe. Hello, Dear Professor. Sorry, I made some noise," said Pooflflush.
"Poor Pooflflush. As far as I can see, they confused you again.
"Aaah, don't ask, Professor. You would not believe what has happened to me all day!
The child had so much cake, chocolate, and fizzy drinks! I told him he shouldn't have eaten
the last candies."