Is it a kind of physical beauty not to be fat or thin?
No, it depends on which angle you look at it. In fitness, muscles are strong where there is meat, and there is no excess fat where there is no meat. Fat content is also a factor to measure body shape. Legs are straight, legs are thin, and the ratio of upper body to lower body is usually the standard for us girls to measure our figure. So, let's see what your requirements are. Too thin to look good, and slightly fat can adjust the visual effect by wearing it. For reference only, I hope it will be useful to you.