奖励那些在道德行为方面梳理榜样的人对于任何社会而言都至关重要。
It is critical for any society to praise those who set an example on moral behaviour.
替换活动，如梳理、拉直羽毛，似乎都是无关的行为。
The displacement activity, the grooming, the straightening of its feathers, seems to be an irrelevant behavior.
你为什么会认为梳理打扮一类的置换活动常常是令人舒适的行为呢？
Why do you think displacement activities are so often comfort behaviors, such as grooming?
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