Definition.com
Punning is a virtue that most effectually promotes the end of good fellowship, which is laughing.
Punning is a virtue that most effectually promotes the end of good fellowship, which is laughing.
Punning is an art of harmonious jingling upon words, which passing in at the ears, and falling upon the diaphragma, excites a titillary motion in those parts, and this being conveyed by the animal spirits into the muscles of the face, raises the cockles of the heart.

Punning is good natured — there was never an enemy to puns who was not an ill-natured man.
Punning is an act like that of the wanton boys that put coppers on the railroad tracks.