Curiosity is the human tendency to know everything,good or bad,about a person or thing.
Curiosity is a bad thing when it is indiscreet like reading the letters of other persons without their permission.It also includes going through the contents of the drawers or closets of others,reading or perusing someone's papers left on the table and opening files or emails of others without consent.Idle curiousity is considered bad such that a blinding desire for novelties of all types:from political news to the latest scandals or romantic entanglements of neighbors or movie stars.
Curiousity is a good thing when it is natural and reasonable desire to know the persons and things that surround a man.Many great inventions and discoveries were led by scientific curiosity.