I'm probably not the only person who has wondered. Now I get it. That would save jumping up and down from the floor or bathtub to the toilet. Might be a lot more relaxing, a little more set up, and my bathroom IS small, but I'm short.
Does this analogy work: fleet enema to red hot water bottle is like red hot water bottle to colema....kind of. And the colonic is different because? more knowledgeable operator? Can one do the colema by oneself?