Many years ago I took a psychology course about strange obsessions that some people suffered. One guy was was focused on his bowels. He was always ‘cleansing’ them. Strange diets, enemas, high colonics—he kept searching for the ultimate cleansing. At one point he either ate sand or somehow created a sand-based enema. It required surgery to correct.
Reading into the second paragraph took me back a half-century to the psych class. I guess some people mind’s just go in really strange directions.
I remember a gastroenterologist who was talking about it said for most people with a laxative in prep for a colonoscopy the colon was nice and clean and he had pictures to prove it. Probably for that reason the "poisoned clogged colon" ads switched to the small intestine for a while.
I don't know how many times I heard about John Wayne's colon in those ads.