“Why do worms taste like chewing gum?”/“Because they’re wrigleys.”

A chewing gum riddle is:
 
Q: Why do worms taste like chewing gum?
A: Because they’re wrigleys.
 
The pun is on the word “wriggle” and “Wrigley” (a brand of chewing gum). The joke has been cited in print since at least 1999.
 
     
Wikipedia: Wrigley Company
The Wm. Wrigley Jr. Company, known as the Wrigley Company, is an American chewing gum company founded on April 1, 1891, by William Wrigley Jr., based in the Global Innovation Center (GIC) in Goose Island, Chicago, Illinois. It is wholly owned by Mars, Incorporated. It is currently the largest manufacturer and marketer of chewing gum in the world.
 
In 1892, Wrigley Jr. began packaging chewing gum with each can of baking powder. The chewing gum eventually became more popular than the baking powder and Wrigley’s reoriented the company to produce the gum.
         
Google Books
The Silly Little Book of Monster Jokes
Bath, UK: Parragon
1999, 2001  
Pg. ?:
Why do worms taste like chewing gum?
Because they’re Wrigley’s.
 
Google Books
Over 1500 Fantastic Jokes
By Guy Campbell and Mark Devins
Egmont Books, Limited
2003
Pg. 292:
Why do worms taste like chewing gum?
Because they’re Wrigleys!
 
Google Groups: Palace of Adult Humor
Worm Jokes
.(JavaScript must be enabled to view this email address)
11/7/06
(...)
Why do worms taste like chewing gum ?
Because they’re wrigleys !
 
Twitter
Bollywood Sargam‏
@bollywoodsargam
Insect jokes - 6059 Joke: Why do worms taste like chewing gum ? Because they’re wrigleys ! .... http://tinyurl.com/p9ye6t
11:52 PM - 27 May 2009
 
30 November 2011, Western Advocate (Bathurst, New South Wales), “HI boys and girls, Slim Tex Warren the singing,” pg. 12:
Q: Why do worms taste like chewing gum?
A: Because they’re Wrigleys.
 
Google Books
Sensible Nonsense.. Frank’s Comic Pack:
Humour Pack Series
By Frank Paul
BookBaby
2014
Pg. ?:
Why do worms taste like chewing gum ?Because they’re wrigleys !
 
Twitter
Lucky Score‏
@LuckyScoreNet
Why do worms taste like chewing gum
?
Because they’re wrigleys !
#Joke from #InsectJokes in #Jokes,  #Humor and #Satire
7:50 AM - 12 Sep 2017