Forever Classic 2CA - Holmsey and Jen and table manners

Are table manners out of date or unnecessary? Holmsey and Jen remember their family's and own etiquette at the table. Alistair used to have to wait till all the women of the table finished before he was allowed to and Kay reminded us never to lick the knife! Don't slurp spaghetti, put your knife and fork together, put your phone away, don't slouch, eat with your mouth closed - what were and are your table manners essentials?