Okay, I'm going to throw in my two-cents here.
I agree totally with @gwhap's comments. In fact, I don't even like the term "klismo" because it is just a label. Like @gwhap, I believe I was basically anal-fixated from a very early age. In fact, I'm pretty sure of it because I liked anything that stimulated my anus and rectum, be it enemas, thermometers, suppositories or whatever, for as long as I can remember. I also believe that anal-fixation is pre-wired and many people may not even be aware of it until something "triggers" a response (such as enemas, thermometers, digital rectal exams, fingering during sex, etc). I do NOT believe that enemas make anyone a so-called "klismo".
Our brain has billions of dendritic synapsis that send signals in every direction imaginable. No two brains are "wired" alike. Sensations to the anal/rectal area may very well connect to those sensations that affect our sexuality and thus we become hooked on those things that we find pleasurable.
I am gay. And believe me, I have fought it tooth and nail because it didn't fit in with my religious beliefs. In looking back at my childhood, I had an attraction that I didn't understand to other boys, not girls. The older I got, the more attracted I became to other boys. Did someone make me that way? Was I sexually abused by a male in my infant or toddler years? Did my mom take some kind of medication while I was in her womb that made me gay? Think about it. If you say that someone made you gay and you weren't born that way, you'll have the LGBT organizations breathing down your neck crying fowl! I've searched my past with a magnifying glass trying to find a reason for who I am, and no where can I find anyone who is responsible for my being the way I am today. No one to lay blame on. None! Nada! I'm anal-fixated because, like being gay, I was pre-wired that way. Perhaps I should be blaming God??
Again, I believe anal fixation is something we come pre-wired for. By no means does it mean giving someone an enema will make them a "klismo". There are adults here that never had an enema in childhood, yet as an adult they find enemas very erotic and/or enjoyable. There are, as others have said, children who have been given enemas that never developed a desire for them in adulthood. And, to my knowledge, there are no research out there that prove giving enemas to children will turn them into klismos.
As I've said before, what goes on behind closed doors between two consenting adults needs to stay behind closed doors. If you can't keep what you enjoy sexually away from your kids, you shouldn't have kids in the first place. But on the flip side of the coin, you shouldn't let what you enjoy in private get in the way of what's best for your family. And, if you are a so-called klismo and your pediatrician orders an enema for your child, there are other options such as getting another family member to do the task or hiring a private duty nurse who does house calls (my mom, an RN, did just that). But NOT to give them an enema because of how YOU feel about them, could be considered criminal by denying children the right to appropriate treatment.
There is nothing wrong with giving kids enemas if they are needed for a medical reason. It's true that enemas don't cure anything (except perhaps in very unusual or rare circumstances), but neither does aspirin or NyQuil. They are used to treat SYMPTOMS of other problems, and sometimes those symptoms can be far worse and far more damaging than the problem itself. Don't deny your family the care they need whatever it is just because of your fetishes. If you can't be responsible enough to separate what you enjoy in your bedroom from your duty as caring, responsible parents then you have a more serious problem that may need some serious counseling.
And lastly, I seriously doubt my mom (or my aunt and uncle) had any worries that giving me enemas for colic bowels (what we call IBS today) and chronic constipation, would have had any psychological impact on me. My mom was an RN and my aunt was an LPN. They both gave lots of enemas in their career to both children and adults and I doubt they ever gave it a second thought because back in those days, giving enemas was almost as common as handing out aspirin. I'm glad that I was given enemas as a child because the pain and suffering from colic bowels was far worse than the enemas, and enemas were the ONLY thing that gave me relief and put me in remission. This practice continues today.