Having owned s colonic clinic for decades, and been to many meetings of colon therapy groups, about 90% or more of therapists are women, which is natural, after all moms give enemas, change diapers, and care for intimate needs of kids. Some dads do, but it is an overwhelmingly female job. Kids grow up to be adults (big kids) who want maternal care in this area.
With patients coming to the clinic, (and here we need to get real. In any medical practice the average number of women to men patients is about 80% women. Women, culturally and physically, require more medical maintenance, so any doctor other than docs speciallizing in male problems see more women than men) I estimate about 80-90% of my patients were women, and I hired female therapists to treat them. Many women and men insist on a female therapist, and a much smaller number insist on a male one.
Again the mom thing. In a culture where most diaper changing was done by men, I think the preferences would reverse. Here until recently we were programed that doctors were men, and nurses were women. People would not go to a female doctor or have a male nurse give them an enema. This is changing, but still somewhat present.
Briefly, practicing colon therapy for more than 30 years and talking to many other colon therapist over the years, it is more than 80% women patients, and over 90% women therapists.
And as I have said many times, where a fetish is involved, the enema is a feminine fetish, even though we all have underlying female brains so that both men and women can have the fetish. The male brain is an adaptation brought on by testosterone as we grow up, and both men and women can develope androgenic, male brains, and meat eating, milk drinking males may fail to develope male brains to match thier bodies, so it is not that simple. The fetish is in the brain, not the body.
That being said, my experience in talking to people is that the fetishes about enemas are about 90% women with the fetish. As always, men predominate in enema groups as they do in adult book stores. Just because 95% or more of the clients of adult book stores are men does not mean women are less interested in sex. It means that men in our society have been more free to express interest and be seen in chat rooms or adult book stores.