A normal person will never understand how uncomfortable the suffering of obsessive-compulsive disorder is, so that many things must be done according to their ideas to not be uncomfortable.

There was once a case of obsessive-compulsive disorder murder, just because the elevator attendant often saw a late employee buttoning the wrong button, and finally couldn't help but kill the person.

The art teacher is not obsessive-compulsive disorder, not the elevator attendant, so she will never understand why there is no marked safe,

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