1. Because no matter how virtuous a person is, he also has a dark side that is unknown, or suddenly has evil thoughts, not to mention ordinary people, so when talking about the sinister and bad behavior of others, he will think of the dark side that he does not want to be touched. This kind of psychological mapping will make people feel ashamed and disgusted with themselves, and people will unconsciously escape.

2. In the process of the formation of social morality, people have produced this moral concept, that is, it is immoral to talk about other people's private affairs behind their backs. The formation of this moral concept is very interesting, which contains people's unconscious purposes. I don't talk about your private affairs, and you don't talk about mine, which creates a "good" premise for yourself to do something wrong in the future without being condemned. On the other hand, it is also an act of psychological self-defense.

Fear of revenge, the so-called insidious is that if you offend the interests of these people, they will do everything possible to retaliate, and it is impossible to prevent. The ability of sinister people to play tricks should not be underestimated.