“What’s the difference between p—and parsley?”/“Nobody eats parsley.”

Parsley is often used as a decoration on a plate, and not to be eaten. A popular off-color joke is:
 
Q: What’s the difference between parsley and pussy?
A: Nobody eats parsley.
 
The joke has been cited in print since at least 1982.
 
   
Google Books
Ballpark
By Michael Schiffer
New York, NY: Simon and Schuster
1982
Pg. 205:
“What’s the difference between parsley and pussy?”
 
She lifted his arm and slid underneath. “I don’t know, Ira ... I give up.”
 
“Nobody eats parsley.”
 
Google Books
Truly Tasteless Jokes
By Blanche Knott
New York, NY: Random House Publishing Group
1985
Pg. 75:
What’s the difference between parsley and pussy?
Nobody eats parsley.
 
Google Groups: alt.sex
Riddle: What’s the difference between parsely and pussy?
Chris Bertholf
8/9/91
In article <1991Aug5….@cudnvr.denver.colorado.edu>

.(JavaScript must be enabled to view this email address) writes:
>Q: What’s the difference between parsley and pussy?
>
>A: You have to put parsley into taboulli to eat it.

I thought the answer was:
Noone eats parsley 😊
   
Google Groups: rec.humor
Revenge of the Blonds
Bill Evans
3/28/94
What’s the difference between parsley and pussy?
Nobody eats parsley.
 
Google Groups: alt.tasteless.jokes
What’s the Difference Between…
.(JavaScript must be enabled to view this email address)
11/11/96
(...)
What’s the difference between parsley and pussy?
Hardly anybody eats parsley.
 
Google Books
The Girl’s-Only Dirty Joke Book
By Karen Smith
Berkeley, CA: Ulysses Press
2008
Pg. 130:
What’s the difference between parsley and pubic hair?
A man will push the parsley aside and keep eating.
 
What’s the difference between parsley and pussy?
Nobody eats parsley.
 
Twitter
adam mcgreggor
‏@adamamyl
@genmon am reminded of the old (dare i say, bad taste) joke: what’s the difference between parsley and pussy? no-one eats parsley. I love it
12:31 PM - 7 Feb 2009
 
reddit
What’s the difference between pussy and parsley? (self.Jokes)
submitted March 22, 2012 by MannequinJack
Nobody eats parsley.
 
reddit
What’s the difference between pussy and parsley? (self.Jokes)
submitted December 20, 2014 by Kazagaroth
Nobody eats parsley.
 
reddit
[NSFW] What’s the difference between pussy and parsley?(self)NSFW
submitted August 31, 2015 by SiestaKing
Nobody eats parsley.