人是爱美的。自从人有了意识之后,同时也就产生了审美观念。即使是在原始社会,人和动物也是不同的。人知道摘树叶遮体避丑,亦即不以光着屁股为美。自从发现了火之后,又变生食为熟食,懂得熟食比生食更鲜美更好吃。而且,人还知道随着季节的变化不断改变他们的生活环境和居住条件。动物则不能。因此,从吃生食到吃熟食, People are beautiful. Since people have the consciousness, also produced the esthetic concept at the same time. Even in primitive society, humans and animals are different. People know that the leaves pick the shade to avoid ugly, that is not bare buttocks for the United States. Since the discovery of the fire, they have become the cooked food, and they know that cooked food is more delicious and tasty than raw food. Moreover, people also know that as the seasons change constantly changing their living environment and living conditions. Animals can not. Therefore, from eating raw food to eating cooked food,