“Decent” is one of those interesting words with multiple meanings.  It can mean “honest and moral,” it can mean “good, though not the best,” and it can mean “fitting to be shown or talked about in public.”

Decent folk find it uncomfortable to hear mention of unseemly things.  Their response to what is morally offensive is the same as their approach to bad manners:  The frozen smile that ignores it into oblivion.

In general, this response is a good thing.  It is one of a decent society’s ways of preserving purity and defending against indecency.

“The mystery genre is moral in itself, for in it that which was hidden is made plain, justice is achieved, and events often turn on a simple dispensation of grace.”

-- Fred Baue, "Mystery and Morality"