Where does Poo come from?

A friend's granddaughter Ruby, same age as Erin but the hair makes her look older. The picture was shared on a group chat when I shared the following joke:

A little boy asks his dad "Where does poo come from?"

His father is taken aback by the question but decides to give his son the facts straight up.

"Well son," he says, "food passes down the esophagus by peristalsis. It enters the stomach, where digestive enzymes induce a probiotic reaction in the alimentary canal. This contracts the protein before waste enters the colon. Water is absorbed, whereupon it enters the rectum finally to emerge as poo."

"Wow," says the boy. "So where does Tigger come from?"

On a more serious note, got the results of a biopsy I had before Xmas, could have been better, an aggressive melanoma but lady luck smiles on me again as it's been detected early and they'll just cut it out by which time they'll have removed so much flesh from my upper back that my left nipple will have relocated to my left shoulder :-)