i mean, to really think an enema would help you out, you'd have to believe that the walls of your intestines, and the things near them, could stay the same for over 3-4 days. this just isn't true. your intestines perpetually sheds its cells and regenerates them, and secretes mucus to remove anything 'sticking' in there.
never mind that, but when this doesn't work, you get things like apendicitis, and peritonitis eventually. if anyone is finding things from a year ago coming out of their ass, they have a decent case of necrosis and gangrene and i would pay to see it on an autopsy tables (b/c they'll be like, dead soon anyway)
i just think a high colonic is dangerous. if you have a minor unnoticeable ulcer or perforation, you could tear your intestines.