Look at the right picture,do you think it is disgusting and shockingly repellent?If you say yes,that means you are a human because hating dense object is the basic instinct of man . In ancient times，serried thing is usually in contact with dangerous eggs，herpes virus infection，social insects and so on.These survival experience have accumulated in our mind for million years .It make us feel bad or even vomiting to escape as so
|on as possible.
But if you have the same feeling or let my scalp pins and needles when you looking the left one ,you may get a kind of Phobias called trypophobia.There are lots of reason can course the disease，the common one is that patients tied the thing he faced when he was hurt in the past and dense object together.The hippocampus remember the unforgettable experience and it will be recalled and replay the feeling when patients meet serried things.
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