Duke Zhou, why do I always dream about my relatives, classmates and friends?

Everyone often dreams, but some people can remember, some people don't remember anything, and some people forget when they dream. Maybe I can remember clearly when I dream, and it is normal to dream about my relatives, friends and classmates often. Sometimes I dream about my childhood, and I don't remember many things before. You can do things you can't remember in your dreams. Sometimes, no matter what movie or novel you watch, it will be the same. Do they have any reason or reason to say that dreaming is dreaming? You don't need Duke Zhou or Wei Meng, because dreaming is a normal physiological phenomenon.