I enjoyed the small enemas I got from mom and by time I was about 11, I was giving myself enemas just because I wanted to. I was a young adult and recently married when I discovered that there were others who did enemas for fun, and even as part of sex play. Since I had previously noticed an enema enhanced my masturbation I decided to see if my wife was interested. With some questioning, I determined that she has never had an enema. So I decided on a multiple part plan.
First, I bought a new combo bag and put it under the bathroom sink where she would be sure to see it. And one evening as we were getting ready for bed she asked me about it. I confessed to her that I have been giving myself enemas, and I liked it, and I had recently read that some couples enjoy doing it together. Her response was that although she has never had one, what she heard from others was an enema was not much fun.
Some days later, I suggested to her that she give me an enema so she could see how it goes. She did, and couldn't help but notice how excited I got as the water flowed into me. I offered to give her one but she declined, saying maybe someday, but not now.
After I had convinced her to give me several, she reluctantly agreed to let me give her one. She only took a small amount before begging me to stop, saying she couldn't hold it. After several tries, each with a small amount she asked me not to do that again. For a while she would give me an enema when I asked, but she would not take one and eventually told me that if I wanted an enema I should do it myself.
She said her main objections were the fear of making a mess, and cooling off sexually while waiting for everybody to get done on the toilet. So now, she does not object when I do it, but just don't ask her to participate.