Sometimes there is a tendency on the part of the guardian or of those around a baby to enjoy its irritability. It is a kind of entertainment for them. Because they love the baby they are amused by the little gesture of annoyance on its part. But by appreciating it, by recognizing it, by observing it, they develop that characteristic. The best thing, however, would be to overlook it, not to acknowledge it, not to be conscious of it, not to feel for one moment that the child is irritable; because once the guardian takes no notice of it, that tendency of the baby will begin to decrease.