“What do you call an eternity?”/“Four blondes in four cars at a four way stop.”

A popular “dumb blonde” joke is:
 
Q: What do you call eternity?
A: Four blondes in four cars at a four way stop.
 
The joke was posted on the newsgroup rec.humor on March 30, 1994.
 
         
Google Groups: rec.humor
BLONDE JOKE LIST WANTED
Kristina Lindberg
3/30/94
(...)
Q:  What do you call four blondes at a four way stop?
A:  Eternity.
 
Google Groups: alt.tasteless.jokes
Good Blonde Joke
Steven K. Robison
2/18/96
Q:      What is “eternity?”
A:      Four blondes in four cars at a four-way stop intersection.
   
Google Books
Leon Schuster’s Lekker, Thick South African Joke Book
By Leon Schuster
Halfway House, South Africa: Zebra
1998
Pg. 52:
What do you call four blondes at a four-way stop?
Eternity. 
 
Google Groups: alt.society.zeitgeist
blonde jokes
Dawdle2day
2/19/98
(...)
What do you call an eternity?
Four Blondes at a four way stop.
   
18 January 1999, Statesman Journal (Salem, OR), “Willamette Whimsy” by Tom Forstrom, pg. D1, col. 1:
What do you call an eternity? Four redheads in four cars at a four-way stop.
 
Google Groups: rec.humor
Blonde Jokes
TheCrypt1
5/20/99
What do you call an eternity?
Four Blondes in four cars at a four way stop.
 
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. 38:
Q: What do you call an eternity?
A: Four blondes at a four-way stop.
 
YouTube
Jokes - What is the definition of eternity? Four blondes in four cars at a four-way stop.
jokesus
Published on Aug 20, 2015
Joke :
What is the definition of eternity?
Four blondes in four cars at a four-way stop.
 
Twitter
Lucky Score‏
@LuckyScoreNet
What do you call an eternity? Four Blondes at a
four way stop.
#Joke from #BlondeJokes in #Jokes,  #Humor and #Satire
9:36 AM - 10 Aug 2017