"Where's Dr. Hoppe?", asked a student.
"I don't know," says Fred, who is Dr. Hoppe's partner.
Fred decided to go and wash his hands in the bathroom. When he entered the bathroom, just before he was about to wash his hands, he saw Dr. Hoppe.
"Hey, Dr. Hoppe. How's it going?" asked Fred
"Very well. Remember concept maps tomorrow," said Dr. Hoppe and he rushed into the cubicle.
Fred washed his hands and heard the cubicle.
"Dr. Hoppe, what are you doing?" asked Fred
"I'm getting rid of my wastes. It feels good!" said Dr. Hoppe.
"Don't know what you mean, but I better get back to class," said Fred
"Okay," said Dr. Hoppe
The rest of the day went as normal.
Question: What did Dr. Hoppe meant when he said he was getting rid of his wastes? Answer on the bottom of this story.¨¨¨¨¨¨¨¨