I'm not sure it's so much about looks as such as that, if something does get spilled, it's a lot easier to wash and cheaper to replace a cover than it is an entire comforter.
> … if something does get spilled, it's a lot easier to wash …
Not eating in bed solves this and some unrelated health problems.
Scabs can also come off etc. Various ways to get bed linens stained. (I don't eat or drink--other than water--in bed. A cover just seems a reasonable precaution.)
And not peeing on your hands is good too, but I still wash my hands after going to the bathroom.
Have you read the article? Children don't need to be eating in bed in order to soil sheets.
The commenter probably uses two sheets, one above and one below the body, so their uncovered comforter is protected from body soiling processes.
Ah yes, "you're holding it wrong."
Don't shit where you eat. Don't eat where you sleep.
And don’t sleep where you shit!
I’m sorry that you can’t think of anything messy happening in bed other than eating food.