Well, everyone likes the feel of pushing out a log, right?
I think that's where it starts.
But scat has numerous ideas behind it that can work for unique scenarios, ranging from treating someone like a human toilet out of sadism to a sign of true and pure love.
How could someone say they love you when you wouldn't even eat your shit?
There's also the aesthetic aspect of it.
Scat has a nice aesthetic to it all on its own.
A person scat also tells you a lot about their character.
It's a very intimate and personal thing.
So, in short, there's lots of reasons to like scat, which is also why most scat artwork is leagues above, say, inflation artwork.
It's an acquired taste