Technically speaking, yukkuri shit is just old filling, it's not that bad, stil offensive if they tell you to eat it or claim it's a glorious gift worth of making the human worship yu's, but that's out of principle.
Plus I doubt this is yukkuri shit, because anon is pressing the yukkuri hard, it's just the filling comming out from the nearest hole out of the yu being under pressure.
It's not limited to shitheads gratifying it. If the paste came out of their ass, that's shit by principle no matter what science told you or how nice they are.
> I'm confident I can cook without anyone knowing it's shit! I'll show them ONIISAN's magic! I name this, ONIISAN's abyuse-style fried rice with paste topping!
Again, because he's pressing hard, there would be more than old filling coming out, this is the paralel of being pressed so hard that guts start coming out from someone's holes.
The hole doesn't magically make it old paste, usually the old filling accumulates under the yu, then it's shitted out, here the yu is forced to let out filling, so both good and old filling comes out.
JusticeItEasy said: The hole doesn't magically make it old paste
...or does it?
Yukkuri are known to defy the laws of physics as long as it fits their understanding, after all. And really, to a yukkuri, it's probably common sense that if something came out of a yukkuri's ass, then it's yukkuri shit, no exceptions.