Because, unfortunately there are still some vile people out there who Don't get that the rest of us do not want to see what passes for a cement mixer in action on their bloody faces! Would help if TV shows made a point of ensuring their characters keep their mouths closed when eating as this is where a lot of youngsters learn it.

And yet it does. I know somebody who is 37 and still eats like she's 5. Open mouth, smacking, obviously squishing her food with her tongue. And no, she's not disabled in any way. Beautiful woman, educated, great career...she just eats like a hog at a trough.

As someone with a very tiny mouth and an unfortunate lack of grace, this one always makes me feel bad. I try my best, but usually just cover my mouth with my hand and take tiny bites of things.

At my middle school lunch-room. I sit next to some pretty bad-mannered people. I once told asked them nicely if they could chew with their mouth closed, and in response, they opened their mouth as wide as they could to chew. keep in mind, this is in 8th grade.

Because one time I got into an epic argument with my husband because he neither chewed with his mouth closed most of the time, nor, and brace yourself for this, would he not use his teeth on his fork. I had tried everything including plastic forks and insisting on watching TV and cranking the sound during dinner. (I was trying to pick my battles.) His response? "I am at home so why do I have to do that kind of stuff? You should feel ultimately comfortable at home and I don't want to have to think about manners." When I pointed out that I live there as well, and you know, didn't I deserve his "manners" he seemed shocked. "But you're MY WIFE! You should be the last person I have to be proper in front of!" I realized that little thought process explained most of my marriage.

Some people aren't taught things like this as a child.

...'cause WAY TOO MANY people do this!

Oh, and there are those shitiots who need to talk about GROSS THINGS when they see you're EATING!

I sometimes do chew with my mouth open. I'm allergic to basically everything, my nose is always stuffed and I'm sorry but I need to breathe, y'know

Because... People

Because apparently a lot of people grow up in households where they don't learn table manners

Because some people were born without any couth

In Vietnam, it's okay to chew with your mouth open. Eating noises are supposed to be positive happy sounds. Personally, I couldn't stand it, but for my work colleague, let's call him Thai Pham, it was perfectly normal.

When I argued that in societies where this is expected, it's okay to let immigrants know it is expected, I was told that cultural assimilation is bad, that I was a racist, etc. This was on reddit on the AITA subreddit when someone asked if the were TA for telling an immigrant to Australia (I think) to chew with their mouth closed. And she was labelled TA for being culturally insensitive. Which is a bunch of ridiculousness.

Because so many people do it!

because people like my sister exist, and chew with their mouth's wide open and loud as Shi-

You'd be surprised at how many people do this...

My mom does that. I HATE being around her when she is eating. Like she has severe disease which cost her few teeth but hey, She is still able to close her mouth. I saw her do that several times without this amount of teeth and it was just fine. Why is it so hard for people to not munch on their food like cows with broken jaw? I have no idea... I hate that sound so much...

Because people are disgusting

A valid question, assuming everyone's mother taught them to chew with their mouth closed.

Because in some cultures chewing noisily is expected to show how much you are enjoying the hosts food

I'm grateful that my young daughter is the only person I've known that does that!

I have this anxious-anger cycle of panic in my mind when I hear someone chewing out loud. I'm losing appetite normally (which isn't normal at all, lol), so it makes no difference for me. I just have an urge to leave the room or blast the music into my ears until I'm close to breaking my eardrums.

yeah... can relate

If it was finger food, then my fingers are in the food. sry