I know. I have several in my family. I used to fat shame them at family get-togethers by pigging out and eating twice as much as them. At first someone would ask, "How can you eat so much and not gain weight?". It would embarrass them when I would say, "Because this is literally the only time I eat this shit. I can eat like this at Thanksgiving and Christmas because the other 363 days of the year I dont eat like a pig". They have since stopped commenting on my eating habits.