“The length of a minute depends on which side of the bathroom door you’re on”

How long is a minute? “The length of a minute depends on which side of the bathroom door you’re on,” according to an old joke. “The length of a minute depends on which side of the bathroom door you are standing” was cited in print in 1966.
 
 
19 January 1966, The Times-Picayune (New Orleans, LA), “Remoulade” by Howard Jacobs, sec. 1, pg. 9, col. 1:
He (Norco Nimrod—ed.) also opined that the length of a minute depends on which side of the bathroom door you are standing.
 
3 April 1967, Altoona (PA) Mirror, pg. 13, col. 3:
How long a minute is depends which side of the bathroom door you are on.
 
Google News Archive
3 May 1969, Baltimore (MD) Afro American, pg. 20, col. 4 ad:
PICTURE THIS by LEON HUDNALL
The length of a minute depends of which side of the bathroom door you happen to be on.
(Leon’s TV Radio Service.—ed.)
 
Google News Archive
18 October 1973, Miami (FL) News, pg. 16A, col.1:
TODAY’S HEARTBURN
Psychology teacher at U-M told her class:
“The length of a minute depends on which side of the bathroom door you’re standing on.”
 
Google News Archive
19 June 1974, Spartanburg (SC) Herald, “Picking A Man” by Dr. Cane, pg. A4, col. 8:
“The length of a minute depends on which side of the bathroom door you’re standing on.”
 
Google Books
Murphy’s Law
By Arthur Bloch
New York, NY: A Perigee Book (The Berkley Publishing Group)
2003
Pg. 147:
Ballance’s Law of Relativity
How long a minute is depends on which side of the bathroom door you’re on.
 
Google Books
The Official Rules:
5,427 Laws, Principles, and Axioms to Help You Cope with Crises, Deadlines, Bad Luck, Rude Behavior, Red Tape, and Attacks by Inanimate Objects
Newburyport, MA: Dover Publications, Inc.
2013
By Paul Dickson
Pg. 362:
Vogel’s Rules.
(...)
(2) The length of a minute depends on which side of the bathroom door you’re on.
(...)
(W. J. Vogel, Toppenish, Washington.)
 
Twitter
★ Alligator Sallie ★
‏@AlligatorSallie
Time is elusive.  A minute can actually be longer……or shorter…..depending upon which side of the bathroom door you’re on.
7:50 AM - 18 May 2015