In my case, nothing I said or did would avoid getting an enema when mom or grandma decided it was time. The effort at hiding in the closet when very young was futile, and resulted in a whoopin' and being held down until I finally capitulated. When the doctor, or his nurse, suggested/ordered an enema, there was no avoiding the outcome.
As I got older, enemas weren't something I loathed. I still disliked getting them from mom or grandma, but losing other privileges wasn't worth the argument. Even into my teens, losing access to the car or going out with friends, was too great of a price to pay, for avoiding their decision to give me an enema.
I've alluded to this in a few other posts. When I came home after surgeries, I knew that my bowels would be of concern. If I had teased my sisters, I usually got it in the end. If I refused to go to the store and buy mom a new enema bag, my driving privileges would be restricted. The bottom line is, if mom was going to give me an enema, there was little I could do or say. At best, I might be able to postpone the event for a little while.
Besides, by then I enjoyed enemas so much that I just preferred some time and privacy to address my own needs. Of course, I seldom refused some help from a few trusted souls.