On a similar note then... I'm no snob, though over time believe myself to have moved from lower working class to probably lower middle class...
I was however taught how to hold a knife and fork properly and whilst my table manners aren't perfect, I'd like to think I'm at least semi acceptable to sit and dine with.
I see some people these days happily just cutting up their food, putting the knife down and then just stabbing and shovelling the food down their gullets whilst holding their fork more like a skewer or something.
Others sit there just scooping food up or even (shudder) stabbing food with their knife and eating it off the end (have seen roast spuds eaten this way a few times)... You're sat in a pub carvery eating a potato for crying out loud, you are not Bear Grills skewering a wild rabbit in the middle of a remote woodland
Manners maketh the man/woman/non-binary/gender fluid/occasional side table/android/or whatever else you identify as....
Boils my blood it does...