discovery “who is that sex god and why haven’t i noticed him before”
research “i have to find out everything about him omg what is his full name what is his birthday do you think he has a wife does he have children does he like jam does he like cats i wonder what photos there are of him is…
Actually it’s because you are more used to seeing your face in the mirror (reflected). As all faces are slightly asymmetrical it looks different when you see yourself in a photo because your face is unreflected.
Other people always see your face as you see it in photos, so they’re used to it looking that way. This explains why your friends think you look better in photos than you think you do.