Someone mentioned the side effect of soft watery stool for hours after an enema, but that's easy for me to avoid with these steps.
(1) Do a series of enemas of increasing volume until the highest comfortable volume is reached, and then do at least three or four more enemas at that volume, (about a gallon for me.).
(2) Optionally use a colon nozzle or colon tube to inject as deeply as possible into the colon.
(3) Use massage and body positioning to expel a big percentage of each enema, and take 10 or 15 minutes to expel the final enema as completely as possible.
(4) Continue doing enemas until the outflow is almost clear, and after expulsion the abdomen is noticeably smaller in size and has the sensation of nearly complete emptiness.
If I follow these steps, which takes me from 45 to 90 minutes, I am totally cleaned out and very horny anally and otherwise. If I need to expel anything from my colon, it's only a very small amount of almost clear liquid for the first 20 minutes or so after my final enema. After that, I usually go for 36 to 48 hours with no need to expel anything. I can extend this time by limiting what I eat and drink.
Anybody else have similar results?