Doesn't that begin from day one?
...With the parent responding for the child
...... then the parent teaching the child to say "tanks" (h-intentionally missing) as they learn to speak
......... then the child mirroring the parents actions
............ then the parent asking the child if they said thank you, and nudging them til they do
............... and so on and so on ..................
For the I don't like its ... isn't that something the parent teaches from the beginning too, with some behind the scenes discussions about gracious appreciations?