The child is crying. It's no use coaxing. It's better to use dad's blood on your eyebrows. Seek an explanation

Psychological effect, is it because dad's blood works, so we should do related research and blank test control. In the words of idealism, they are all very important. As the saying goes, "one hair affects the whole body". In reality, it is often the result of a combination of many factors. Buddhism is called karma, and cutting off any link that leads to the result will not make the result happen.