I remember getting an enema when I was about four. I woke up in the middle of the night--must have been in pain because I was crying or complaining. My mother got my Dad up and they took me into our small, cramped bathroom. We didn't have a tub, just a shower, sink and toiled.
I was wearing my robe and they prepared an enema in my Mom's old black bag. It was a combo item for enemas, douches, and hot water bottle use. At any rate, I wasn't aware of any of the preparations--such as filling the bag, etc. because I was still sleepy. I do remember being placed over my fathers bare thighs--I think I can still feel the knees, the hair and toughness of his thighs.
They placed me face-down, lifted up my robe but kept me more-or-less covered and then inserted the nozzle and started the flow. My mother was standing holding the bag and, I suppose, controlling the flow. I do not remember cramping or any discomfort. In fact,I must have been enjoying it because I was sleepy but the warm water felt wonderful as it filled me. I'm not sure how much water I received in this enema, but the sensation was wonderful as I've just said. They placed me on the toilet, I still was wearing my robe, and I voided a great deal. It came out in chunks and bits and pieces, but that felt good as well. All the while I was still very sleepy and barely opened my eyes--just must have been enjoying the experience. Strange that I don't remember being cleaned-up or put back to bed, but that must have happened...
I suspect that it must have been a turn-on because I believe I must have been making sounds that seemed as if I was pleasured. I also suspect that I may have had an erection because the next day my father, after coming back home from work, approached me with a big smile on his face and asked me in a somewhat joking way if I'd like an enema. I was a bit embarassed so I tried to dismiss it--but the memory stuck and, to this day, I still get a thrill thinking of that experience, the bag, the feeling of lying over my father's legs and the wonderful feeling of the warmth and comfort from that enema.
Guess that you'll have no difficulty learning that this was a life-changing experience. Since then it's always been an interest, to put it mildly!