This kind of words generally appear in ancient novels, such as keeping secrets and feeling inferior. It is also called: once you are unfaithful, you are not allowed a hundred times, which means that a mistake made by others will mark your life. One infidelity determines a hundred futures.
As the saying goes, there is one, one and three. Once bitten, twice shy. Generally, it describes that one spouse is unfaithful to the other spouse or subordinates are unfaithful to their superiors. An act of infidelity will give people the thinking concept of such infidelity in the future, and they will never believe it again.
In fact, from a person's behavior, it should be understood and distinguished at several levels. The most taboo of employing people in ancient times was to meet "treacherous officials" Now people are afraid to make false friends who stab themselves in the back. Quite simply, these people are unfaithful to their masters and betray their bosses. Since ancient times, there has been a saying of "infidelity a hundred times".