Some reasons for secrecy is that if you advertise you are into enemas, about 90% of people will consider you a pervert, that can be bad with husbands, wives, coworkers, next door neighbors etc. On line most people, except me, use a fake name to hide behind. But there is the 10% that will be interested.
Next, how important is it to you. If you are interested in enemas and want to try it, it's not that important. If you have been fantasizing about having enemas since you were five, and it is the central theme of your sexuality, then look for the right person, and take the necessary risk, with necessary caution.
In contrast to those that say try a list of things first, be aware that fetishes tend to be very specific. A person that likes loving enemas will be appalled by painful, cruel ones, as I am, etc. There are about 8 billion people on earth with about 8 billion different fetishes, the best that can be hoped for is a close match, and a partner willing to meet you needs, and doing things that are repulsive to you to get them to play your game doesn't work either, so gauge your options. And there are some very bad options: IE the young medical student in Boston who was just arrested for killing women from Craig's list. He looked great, nice guy etc, just liked to shoot a women on the side, but that's not how he got them in a room alone with him. Be careful meeting people, anonymity is good, but has some big risk.
the enema is in the vein of non harmful fetishes, but with all the secrecy, it could be used by a predator. But any safe, true enema lover will give a non harmful, pleasant treatment that some people find sexual. If you do and your partner doesn't that is fine when you want to have enemas. Giving them is no big deal, fifteen minutes of their time, and no risk to them. If you find a person willing, actually loving you enough to take care of you, and their fantasies are not repulsive to you, you can work with that, and should. sex, live, and love are two way streets.
I hope this helps, but a strong fetish needs to he honored. If your mate can't, don't marry. If they talk to much and it hurts you that can be a problem too, what starts in the bedroom should stay in the bedroom, and anything you do that doesn't cause harm, is your business.
Far beyond enemas, if the fetishes of everyone you have ever known, were known they would all be in trouble, we all have them, the key is to control the ones that can do harm, and accept and work with the ones that do no harm---and enemas are very high on the list of those that do no harm, properly done they only make you more healthful.
Hope this helps