Wow, I suppose I should have been a little more clear.
For years (1000s) people have been using enemas to clear bowel obstructions and purify. As everyone went crazy with the rotting meat comment, yes a percentage of some meats go undigested, these meats will form blockages over time. (Mostly Mac D's kinda meats, highly processed.)
People with GI bleeds shouldn't for medical reasons have enemas.
Some of the other professions that have enemas are horse jockeys, race car drivers ect., so I take it the weight loss is real.
When I used to wrestle, I'd drop 3-6 pounds from the enema. I never looked to see the condition of what comes out. The smell was enough.
(Not a doctor, I'm in no way saying, run out and have warm water pumped into your ass.)