I'm so old that I remember when people held doors open for one another, said please and thank you, said good morning to strangers, helped their significant others with their coats, pulled out chairs to seat their wives.
Once after pulling the chair for the Princess at Cracker Barrel, a man somewhat belligerently said, " What are you doing? Trying to make the rest of us look bad?"  I replied, "I find that many don't need any help with that."  Dining room erupted in laughter, and he slunk back to his table.