Many countries (usually Asians and Africans) hold this belief
There was once my senior brought home a skeleton from a real body (for educational purposes). That night she had sleep paralysis for the first time in her life (she's around 30). The next morning, she told her friends in excitement and thrill. The talk turned into gossip circle and it turned out that everyone who brings home the particular skeleton my senior took home and not the other skeletons (there are 6 skeletons) experiences sleep paralysis. After returning it back, she never has sleep paralysis again until now.
Scientific or supernatural? You ask methus sleep medicine is hard to study
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its all about the brains. If you think too much, you get nightmares.


