Contrary to popular belief, puns are not all bad. Indeed, they can be intelligent, literate and witty. But a high-quality pun must meet several criteria. The best ones are: (1) original, (2) ingenious, (3) natural and meaningful rather than contrived or labored, and, of course, (4) funny.
""When I Hear the Word 'Culture,' I Reach for my Pun!","
Word Ways: Vol. 40
, Article 26.
Available at: http://digitalcommons.butler.edu/wordways/vol40/iss2/26