One thing I've tried it is to phrase it something like ...
"I'm not sure if you're aware, but you are chewing quite loudly"
Tone (neutral) is important. Sometimes they genuinely aren't aware. They know it's theoretically a social faux pas but never thought to check themselves.
"I'm not sure if you're aware, but you are chewing quite loudly"
Tone (neutral) is important. Sometimes they genuinely aren't aware. They know it's theoretically a social faux pas but never thought to check themselves.
I think they've grown up around loud eaters.