Why do some people always laugh at others in front of you? Many people also laugh, which proves that this person can't be intimate.

Psychologically speaking, a person who always laughs at others may be expressing his dissatisfaction or jealousy (venting the pressure in his heart), but it deliberately mentions to you that he may value you more (or you have a relationship with that person), thus planting seeds in your heart, and then thinking with his mind set, he can complete his purpose. It may also be used to show yourself in front of you and show your strengths with other people's achievements.