What do you think is the best mouth shape for boys?

The thickness of the lips is very beautiful, but in fact there are no clear beautiful and ugly facial features. The harmony of the five senses has one or two bright spots. For example, people in China think thick lips are ugly. In fact, many of them are because the chin is short, which makes the lips look like sausages. Some people think that thin lips are not good-looking because the facial features are weak and there is no obvious distinction between beauty and ugliness.