Yes, the Daddy fetish exists within the context of enemas.
I am not a little, but when I first started phone play with my partner between our in person meetings, I just spontaneously started calling him Daddy when he said it was time for my anal training and enema. It just sort of slipped out when I needed to answer him , fortunately, he loved it, as much as I did.
When we met in person, the same thing happened when it came to enemas and some types of anal play. The rest of the time, I did not call him Daddy, except for spanking play and some anal play but not most of it.
Does that help?