Why do my wedding photos show stiff, chubby faces, let alone photographers?

Every time we take a selfie, every time we take a photo of Xiu Xiu, we become more and more beautiful, but most photographers don't take selfies with SLR as we do, and most digital artists don't take photos of Xiu Xiu as we do. Obviously, we took a good selfie, with big eyes, straight nose, thin mouth and pointed chin. When I arrived at them, my glasses were smaller, my nose was flat, my mouth was sausage, my chin was fat, and my whole face was not the face in our mobile phone. So, take a wedding photo with your mobile phone. Now the photo studio is not professional, don't spend money to make yourself ugly. ,,,, O(∩_∩)O Haha ~