Psychologically, psychological factors account for the most. First of all, even Michael thinks that one party can't find a suitable person to talk to in order to relieve psychological pressure, but finds someone to vent on the Internet. Both parties express their inner stories to strangers in the form of online connection, thus achieving the purpose of comforting and dumping pressure. Some people can also find a sense of security in this process.
Extended data
In online chat, KP and PK have roughly the same meaning, and both mean to invite each other to play. Of course, playing is not necessarily just a game, but also a "game" in all aspects of technical language.
Generally speaking, people will say PK when challenging or inviting each other to fight, but some countries will say KP instead of PK when inviting each other to fight or fight. For example, in South Korea, Korean citizens are used to saying KP when inviting each other to fight.