You have been working on a principle that applies generally.

You have acquired a good habit which can never really fail you.
If my friend had invited Mrs.Smith to supper and served baked beans for the sake of relaxing out of the tension of her resistance to the sugar, then she could have conquered that resistance.

But to try to conquer an annoyance like that without knowing how to yield in some way would be, so far as I know, an impossibility.

Of course, we would prefer that our friends should not have any disagreeable, ill-bred, personal ways, but we can go through the world without resisting them, and there is no chance of helping any one out of them through our own resistances.
On the other hand a way may open by which the woman's attention is called to the very unhealthy habit of rocking--or eating sugar on beans--if we are ready, without resistance, to point it out to her.

And if no way opens we have at least put ourselves out of bondage to her.
The second way in which other people get on our nerves is more serious and more difficult.