From my own perspective, I think it should be narcissism. No irony, because I've done it before. ) And some people use their photos as avatars just to attract more people's attention. Then let those strangers be willing or like to be friends with themselves.

Of course, we also know that those who use their own photos as headshots always take photos from the most beautiful angle before they become headshots. Not to show contempt, because normal people want to show their best side to others. This may also be regarded as a more positive attitude. I want to make better friends with others. Therefore, show your photos directly on your head portrait, hoping that those who often talk to themselves voluntarily but insist on not taking photos can see their head portrait and think it is their original picture. I won't ask you for your photo again.

For example, I used my avatar as my photo for a while before, and I felt really uncomfortable, which would make some same-sex people think that you were showing off your beauty. On the contrary, I think it's not worthwhile to argue with others because of an avatar. It is better to use some anime avatars or cartoons or Yan characters as your own avatars. Even my mother said I would be narcissistic. I actually want them to look at me and not look at my photos often. But others will think that you are just showing off, so I don't recommend taking my photo as an avatar.

You can't say that this is completely wrong. Because of its positive effects, such as wanting to make good friends with others. Speaking of which, I remember that some primary school students use their own photos as their avatars, which is really a feeling and non-mainstream practice.