My siblings and I got enemas as far back as I can remember from mom or grandma in the late forties and early fifties. However, when I was six things changed. Grandma taught our two preteen aunts personal hygiene and how to care for and give children enemas. Something I remember quite well, because grandma used me and my brother as her teaching subjects. The first day, grandma showed the girls how to give us an enema laying across their lap.
Then, the next day, the girls had to demonstrate to their RN mom (our grandmother) that they could give us a soapy followed by a rinse enema laying across their lap. Afterwards, they were given the responsibility of giving us our evening bath including enemas. These were traditional Ivory soap soapy followed by salt and baking soda rinse enemas. The girls gave us enemas laying across their lap, then as we got older, in the knee chest position. This continuing, using standard bags and nozzles of the day, until we reached double digits. At which time, like the girls, grandma taught us personal hygiene and enemas became our responsibility. Shortly afterwards, my siblings and I started swapping enemas with one another, ended when we finished High School.
After I got married, my wife and I used enemas for a variety of reasons, among them health and pleasure. Then, once we had kids of our own, their pediatrician recommended we give them enemas, rather than laxatives for constipation and various other issues. Fast forward to today, I still use traditional enemas when needed or wanted, generally on a biweekly or monthly basis.