The horse is annoyed, but he does not know what it is that annoys him.

Now, when a horse shies you drive him away from the automobile and quiet him down, and then, if you are a good trainer, you drive him back again right in front of that car or some other one, and you repeat the process until the automobile becomes an ordinary impression to him, and he is no longer afraid of it.
There is, however, just this difference between a woman and a horse: the woman has her own free will behind her annoyance, and a horse has not.

If my friend had asked Mrs.Smith to supper twice a week, and had served baked beans each time and herself passed her the sugar with careful courtesy, and if she had done it all deliberately for the sake of getting over her annoyance, she would probably have only increased it until the strain would have got on her nerves much more seriously than Mrs.Smith ever had.

Not only that, but she would have found herself resisting other people's peculiarities more than ever before; I have seen people in nervous prostration from causes no more serious than that, on the surface.

It is the habit of resistance and resentment back of the surface annoyance which is the serious cause of many a woman's attack of nerves.
Every woman is a slave to every other woman who annoys her.