It seems to me that human reactions are largely programmed.
Behavior in certain situations demonstrates social engineering, or maybe it's just an artifact of our species.
When someone dies, friends and family mourn, remember, laugh, cry, wear black, dig a hole, and so forth--and people say catch phrases like "sorry for your loss", which is absurd and meaningless.
Yet people on their way to a funeral sometimes seem exasperated at having to get dressed up and waste time around dead bodies and sad people. Why go? The dead person certainly doesn't seem to give a shit if you're there or not.
Maybe it's more about what other people will think regarding someone not showing up to a funeral?