Giggling is just everyone's idea, that is to say, everyone thinks that this person is not particularly smart, and then everyone does some directional behavior to him, and then the other person gives that simple and honest smile instead of being angry. I think it's a smirk. In fact, this kind of person's life will be much happier than normal people. It is because he doesn't think too much that his quality of life is higher than others. Because the smarter and more flexible the brain is, the more things he worries about, and he will be afraid of wolves and tigers. It takes him a long time to make up his mind to do anything, but for those who often giggle because their brains are not particularly smart.
Others laughed and simply felt that they didn't care about this thing. An ant will turn a blind eye to how the elephant provokes the elephant, because it can't have any influence on the elephant. So this is a kind of contempt for strength and mentality. People think that these long-term things you say have absolute strength to refute you through reality, and then a better natural mentality will improve the health level of the body to a certain extent, because our mentality determines our brain, and our brain determines the hormone secretion in our body, which indirectly affects our health quality.
There is some truth in the sentence "Smile for ten years". Although it is not as horrible as this sentence, maintaining a good attitude is of great help to our healthy life, because the spirit affects the body.