“Do zombies eat popcorn with their fingers?”/“No, they eat fingers separately.”

A popular Halloween riddle about how zombies (or monsters) eat is:
 
Q: Do zombies eat popcorn with their fingers?
A: No, they eat the fingers separately.

 
The joke has been cited in print since at least 1999.
 
       
Google Groups: rec.music.makers.bagpipe
Halloween    
Bagpiip
11/1/99
(...)
Q: Do monsters eat popcorn with their fingers?
A: NO, they eat the fingers separately.
 
Google Groups: alt.halloween.boo
Halloween Jokes
stirling
11/8/99
(...)
Q: Do monsters eat popcorn with their fingers?
A: NO, they eat the fingers separately.
 
26 October 2000, Des Moines (IA) Register, “Need a joke? The Web comes to the rescue,” Iowa Life, pg. 2E, col. 3:
Do zombies eat popcorn with their fingers?
No, they eat the fingers separately.
 
Google Groups: alt.humor.puns
Halloween Puns of the Weak 10/19/01
Stan Kegel
10/19/01
(...)
Do zombies eat popcorn with their fingers?
No, they eat the fingers separately.(Jackie Holle)
 
Twitter
Rick Castello
‏@Fungible
Q: Do Zombies eat popcorn with their fingers?  A: No, they eat the fingers separately.
1:16 PM - 31 Oct 2007
 
Twitter
Karyn Buxman
‏@KarynBuxman
Halloween joke from an attendee at my presentation today: Do zombies eat popcorn with their fingers? No, they eat the fingers separately.
12:15 AM - 24 Oct 2008
 
Google Books
Fun Campfire Ghost Stories
By John Bradshaw
Lulu Press (Lulu.com)
2009
Pg. 113:
Do zombies eat popcorn with their fingers?
No they eat the fingers separate!
 
Google Books
Horrid Henry’s Joke Book
By Francesca Simon
Naperville, IL” Sourcebooks Jabberwocky
2010
Pg. 13:
Do zombies eat popcorn with their fingers?
No, they eat the fingers separately.
 
Google Books
101 Amazing Spooky Jokes
By Jack Goldstein
Andrews UK Limited
2013
Pg. ?:
Do monsters like to eat popcorn with their fingers?
No, they prefer to eat fingers separately!
 
Google Books
Halloween Monster Jokes For Kids
By Peter Crumpton
PeteyRF Creative
2015
Pg. ?:
Do monsters eat popcorn with their fingers?
NO, they eat the fingers separately!