There is a big fairy nightmare in the story about the biography of the Eight Immortals in Baidu Post Bar!

Incubus, also known as the nightmare woman, is a banshee who comes and mates with men while they are sleeping. It originated from medieval legends and is generally described as a coquettish woman with wings and tail, who will absorb the essence of men. Incubus, a male, refers to a male demon who comes and copulates with a woman while she is sleeping. Generally, he is a handsome guy and will absorb the essence of women. It usually takes ten days to absorb the essence of a woman. When people are sleeping, they suddenly feel as if there is a thousand pounds of weight on their bodies, and they can't breathe. They seem to wake up and want to shout, but they can't move. People are confused and frightened. It's as if there is a transparent thing pressing on them, coupled with dreams, giving them a name called "pressing ghosts." In fact, this is called "nightmare" in medicine. (Note: nightmare and incus are not the same word, and the second word is written differently. The so-called different definitions here are only used for parallel comparison. Like dreaming, nightmares are also a physiological phenomenon. When a person suddenly wakes up from a dream, a part of the nerve center of the brain has woken up, but the nerve center that dominates the muscles has not fully woken up, so even if he feels uncomfortable, he can't move. At this time, if someone wakes him or pushes him, the nightmare will disappear immediately. In fact, this phenomenon is very common. For example, when we just wake up, we can't completely swing our fists; Many people have to wait a few minutes after waking up, which is why the central nervous system works out of sync. Lying on your back, being covered with a thick quilt or putting your hands on your chest, being too nervous during the day and overeating at dinner are all the reasons for nightmares. If the audience is careful, they will find that those who are possessed by ghosts are lying on their backs. If they sleep on their side and avoid the above incentives, they won't have nightmares.