I was given enemas from such a young age, I associated them with sexual desire before I could understand exactly what that meant.
The effect this has had as I've become an adult is that often, I desire an enema more than I desire sex.
Often, when I was married (to a man who wouldn't let me have anything a nozzle on it in the house), the only way I could climax was to fantasize about being given an enema.
To put this another way - sex is fun, but enemas are better.
As far as the health aspect goes, often I use that as an excuse to take one. I've actually lied about being constipated in order to get one.
So for me, the health aspect is an added bonus. But it does exist. I have more energy when I take enemas on a regular basis. They are good therapy for hangovers, especially if you do one or two without salt or baking soda, just plain water. They cure my headaches (maybe because my headaches are a result of dehydration). They are also great for relieving menstrual cramps. I like to take them very hot, and place the bottle under my abdomen. That way I get heat on my uterus from both inside and out. Finally, they are very, very relaxing. I sometimes take one when I'm upset or stressed out. After two slowly adminstered quarts of warm water and an orgasm, I feel calm, and ready to take a nap. I feel like a million bucks when I wake up.
Finally, to Kat - try yogurt. Frequent enemas can upset the flora in the intestine, and this can cause stomach cramps, diarhea, and a whole host of other nasties. Fortunately this is easy to fix. For most people, eating one standard size cup of yogurt per day or taking Acidophilius tablets is enough to offset this. It's good for us women to eat yogurt anyway. It prevents yeast infections.