I am 69. I have had a strong rectal temperature fetish, giving and receving, thoughout my life, but I never had an enema.
Rectal temperature was the norm in my family for measuring temperature for adult and children. My mother was a bit overprotective and she used to take my rectal temperature every time we thought I looked sick or just tired. She was allways nice and gentle. As a teenager, I quickly discovered I enjoyed masturbation with the stimulation of a rectal thermometer in my rectum. I still do.
I don't think enemas were popular in France in the 50's or 60's in the urban upper middle class, I never heard a word about enemas in the family circle and I discovered them at school, like most of my schoolmates I guess, when we studied Molière, a famous French play writer of the 17th century who made a lot of references to them in his comedies.
I am now a poor old bachelor and I take care of my rectal temperature alone. I have lived with a few women and some of them enjoyed rectal temperature as much as I do and I would say rectal temperature has been an important part of my sexlife. But none of them ever mentioned enema or suggested to try it.
So, I never had an enema. I don't like the idea of liquid invading my belly and having to evacuate it, with the associated cramps. I don't see anything erotic in this. I am very afraid to have, one day, to submit to an enema in a medical procedure.
I never had an enema. May be I missed something.