Conversation

A little boy asks his dad "Where does poo come from dad?"
His dad explains "Well son, food passes down the Osophagus by peristalsis. It enters into the stomach, where digestive enzymes induce a pro-biotic reaction in the alimentary canal, this extracts the protein before waste product enter the colon, water is absorbed, whereupon it then enters the rectum finally to emerge as poo".
"Blimey" says the little lad. "so where does Tigger come from then?"