Isn't Didymus also a dog? How can he ride a dog?
Or is this another Goofy/Pluto kind of thing, a riddle that will plague humankind forever?
And is Didymus short of Epididymus? The thing that carries sperm in your ballsac? Ewwww.
I want the doctor to take your picture so I can look at you from inside as well.