In fact, the dream is just an introduction, or you may think of cows during the day, or watch TV and play games, and cows give you an impression. This is also called thinking day and night. Dreaming at night, of course, also has inexplicable dreams. So don't think too much, in this era of rapid development of science and technology, will you still believe it?
I don't know the answer, but you are satisfied. I wish you happiness!