I was born at a very early age...
And like you HarryX, always hold the door open for other people..
Most of the time with no thanks, but oh well, still do it.
I was brought up to to be well mannered & polite, which as my dad said.
costs nothing..
Once went out for a bike ride with my dad & he bought me a Milky Way.
I dropped the wrapper on the pavement & he gave me such a clout round the earole' :'(
He said "Take it home with you, and don't let me catch you dropping litter again!"
Never forgot that..( You want to see my pockets...lol ;D)