Informal means of control
At funerals, people tend to comport themselves to look as if they are grieving, even if they did not know the person who passed away. This is example of a social situation controlling an individual's emotions.
Source
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"Funeral For A Friend & Co-Worker | Flickr - Photo Sharing!."
http://www.flickr.com/photos/78428166@N00/6973381150/
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