“Two dragons walk into a bar…” (bar joke)

“A guy walks into a bar…” is a typical form of what has been called the “bar joke.” A dragon version is:
 
“Two dragons walk into a bar. One dragon says, ‘It’s warm in here.’ The other says, ‘Shut your mouth.’”
 
The joke was cited on Twitter on November 12, 2009.
         
 
Twitter
ellie
‏@ellietheking
@JLSOfficial two dragons walk into a bar. on says ‘its hot in here’ the other replies ‘shut your mouth!’
10:43 AM - 12 Nov 2009
 
Twitter
Marcus DSilva
‏@wwwmarcusdsilva
Two dragons walk into a bar. One dragon says to the other dragon, its hot in here. The other dragon says, shut your mouth!
7:35 AM - 15 Dec 2009
     
Andrea Ng Internet/Online
Saturday, 27 August 2011
Two dragons walk into a bar. One dragon says, “It’s warm in here.” The other says, “Shut your mouth.”
Posted by Andrea Ng at 10:11
 
Google Books
The Mammoth Book of One-Liners
By Geoff Tibballs
London: Constable & Robinson Ltd
2012
Pg. ?:
Two dragons walk into a bar. One says: “It’s hot in here.” The other says: “Shut your mouth!”
 
Google Books
5,000 Great One Liners
By Grant Tucker
London: The Robson Press
2012
Pg. ?:
Two dragons walk into a bar. One dragon says, ‘It’s warm in here.’ The other says, ‘Shut your mouth.”
 
reddit
Two Dragons walk into a bar (self.Jokes)
submitted February 21, 2013 by daidalos5
One dragon says, “It’s hot in here”.
“Shut your mouth”, says the other dragon.
 
reddit
Two dragons walk into a bar. One says ” Its roasting in here!!”, the other says “shut yer mouth then” (self.Jokes)
submitted November 29, 2015 by Dont_Mess_With_Latex