There is a kind of person. When you are healthy, you think of him as a disaster star and avoid him as much as possible. When you are sick, you worship him as a god. As long as he can say: You can't die! This kind of person is a doctor. But there is a kind of building that you think is superfluous when you are as light as a swallow, and you cover your nose when you pass by it. But when you are anxious, you can't find it. You beg your grandfather and grandma to find it with great difficulty, and that is the toilet.
Conception: