“Why don’t cannibals eat divorced women?”/“They’re too bitter.”

A cannibal riddle is:
 
Q: Why don’t cannibals eat divorced women?
A: They’re too bitter.
 
The joke was posted on the newsgroup alt.callahans on December 4, 1999.
   
     
Google Groups: alt.callahans
Puns of the Weak 12-3-99
Stan Kegel
12/4/99
(...) 
Why won’t cannibals eat divorced women?
They’re very bitter. (Original Sin)
 
Google Groups: rec.humor
Q&A’s
Robert Biggs
12/17/99
(...)
Q: Why won’t cannibals eat divorced women?
A: They’re very bitter.
   
Google Groups: alt.humor.puns
Puns of the Weak 12-13-04
Stan Kegel
12/14/04
(...)
Why won’t cannibals eat divorced women?
They’re always bitter. (Cookie)
 
Twitter
pseudus
@pseudus
Why don’t cannibals eat divorced women?  Because they are too bitter….! 😊
4:15 PM - 4 Mar 2009
     
5 November 2010, The Sun (London, UK), “Great scapes” by Natasha Harding, pg. 76:
Why don’t cannibals eat divorced women? Because they’re very bitter.
   
Google Books
Ultimate Book of Jokes:
The Essential Collection of More Than 1,500 Jokes
By Scott McNeely
San Francisco, CA: Chronicle Books
2011
Pg. 131:
Q : Why won’t cannibals eat divorced women?
A: Too bitter.
 
Google Books
The Mammoth Book of Really Silly Jokes:
Humour for the whole family
By Geoff Tibballs
London, UK: Constable & Robinson Ltd
2011
Pg. ?:
Why won’t cannibals eat divorced women?
They’re very bitter.
     
Reddit—Funny
Here’s a joke for those recently divorced gentlemen. (self.funny)
submitted July 30, 2013 by Andre_Gigante
Why won’t cannibals eat divorced women?
They’re bitter.
   
Reddit—Jokes
Why don’t cannibals eat divorced women?
submitted July 6, 2016 by daftwordhero
They’re too bitter.
 
Reddit—Jokes
Why don’t cannibals eat divorced women?
submitted March 10, 2018 by Antsy_Siegel
They’re too bitter.