There are many reasons. If you want to know whether you are fat or thin, you should call yourself weighing scale.

Old pants are related to body shape and whether they fit. For example, the crotch is shallow, the waist of shallow crotch pants is below the navel, and people with higher abdomen often drop their pants, which is more suitable for wearing ordinary pants or high crotch pants.

Generally, fat people don't necessarily lose their pants, so they can adjust the tightness of their belts. Only the fat deposition in the stomach in the picture, the belt is like a mountainside, and it can't stop the downward trend.