The camera’s POV has a lot to do with it. Your stereo eyes, in conjunction with your brain, corrects the view that you see. The camera has only one “eye” and that allows for a lot of variation. Also, how high or low the camera is when it “sees” you has a lot to do with perspective. A standard 55mm. lens can be quite wide angle that affects photos. Ever see a picture of a person taken with a very wide angle “fish eye” lens? Consider photos of you that were taken at a distance, rather than close up. And if you still think you look fat in photos, quit looking at them!