From A Demon's Nest of Sentiments

[thewayne]

Deceit (noun): A dog rolls on the carcass of a dead possum in order to deceive other animals as to his identity as a dog. A man lolls in the scents of a church in order to deceive all around him as to his identity as a thief, an adulterer and a liar.

The difference is that the dog will not first have to endure being bored by the possum.

http://www.gocomics.com/pibgorn/2014/10/12