Because in ancient times, when farmers planted crops, a large part of nutrients, that is, feces and shit, were also very popular fertilizers, so as long as they picked up a piece on the road, they were really as happy as finding money, so they passed it down bit by bit and became a symbol of good luck.

In modern times, the irony is that you are lucky, or you are unlucky and lucky.

There are two applications of dumb luck. One is the modesty mode when it is used on oneself, which is self-deprecating on the surface, but actually shows modesty. The other is that when you use it on others, there is a sense of jealousy lurking in your heart, but what you don't like is what you envy, and then you say that the other person is lucky.

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