As a youngster, enemas seemed to be quite punitive, and mom and grandma seemed pretty heavy handed during the process. I got enemas as part of the toilet training process, and then knew that an enema was forthcoming if I didn't produce the expected BM. Our pediatrician seemed to be an advocate for their use and frequently scolded my mom if she called him for a digestive problem prior to trying to resolve it with an enema.
Physically, I'm sure my resistance necessitated some degree of force to overcome my reluctance. Psychologically, this precipitated some issues that lasted for a lifetime with regards to my mom. I did what I was told and what was expected, or I suffered the consequences.
As I grew and developed, my enema curiosities blossomed. After all, the red enema bag or amber douche bag stared me in the face day after day. I feared it when young, but gradually came to befriend it. By the time I was 6, the sensations of anal penetration and the flow of water triggered some reactions that I still didn't totally understand.
I also figured out that I could accomplish a BM without my mom or grandma wrestling me into the tub. I still got some from them, but I was self-administering as well. The enema or douche bag got a regular workout from me. I didn't have to lie about having had a BM. I just didn't let them know how it came about. Even if I had been caught or challenged, I could always rationalize that an enema was the way they would cause me to have a BM. I don't know if they ever figured it out, but neither ever said anything.
The bottom line is that those rubber tools produced some fantastic sensations as I progressed through puberty. Enemas were my initial exposure to a sexual act. When other, more common sexual encounters were sparse, the enema or douche bag became wonderful substitutes and didn't necessitate other precautions. That being said, enemas didn't replace otherwise healthy sexual activity, but could sure enhance or trigger some involuntary reactions. Who needs Viagra or Cialis when a quart or two of liquid enhancement is incorporated?
Is that some weird psychology?... or just some shits and giggles in an otherwise stressful existence?