Why do boys delete chat records with their girlfriends?

Boys delete chat records with their girlfriends, mainly in the following situations:

1. There is too much junk in the mobile phone, which causes it to run too slowly. Cleaning up the chat history is to make the mobile phone run faster after cleaning up the garbage.

2. The boy quarreled with his girlfriend, and maybe he said something irrational. Afterwards, he felt that he shouldn't say that, so he deleted the information.

3. In the process of chatting, boys and girlfriends may involve some privacy issues of both sides. This information is a security risk, so it was deleted.

Boys think that girlfriends should not be made public, so they quickly delete information after chatting to avoid others knowing.

In short, there are probably the above situations in which boys delete chat records with their girlfriends. This is my analysis from a female perspective.