I'm not quite sure why the solo enema pictures of men would be "sad", but I can understand why these pictures just generally does not appeal to everyone.
I would like to have the whole enema experience... Which of course would mean enemas done with the presence of another person involved. In my case I would like doing it with either sex, and someday having experienced enemas with both sexes.
And if someday this comes to happen for me, I do not seriously believe that my solo enema activity would come to an end...
But for now, the pictures that I've shared with others and through this and other sites has been a way for me to share this kink with other people... And let's face it, looking for a way to share a "kink" with others, can often be a "lonely" experience.
Lot of people don't like male enema pictures, but there are a lot of people that do. I will agree with Walt though... Each to their own, and add that is great to have freedom of choice here, no matter what your preference. :)