“Decaffeinated coffee is kind of like kissing your sister”

“Decaffeinated coffee is kind of like kissing your sister” is a one-line coffee saying that has been printed on many images. “‘Decaffeinated coffee?  Kinda like kissing your sister.’—Bob Irwin (.(JavaScript must be enabled to view this email address))” was posted on the newsgroup alt.sources on October 20, 1990. This is probably not Australian naturalist Bob Irwin.
   
“A tie game is like kissing your sister” is a related “kissing your sister” saying. The “kissing your sister” expression means something dull and awkward, rather than exciting (such as kissing a person one is attracted to).
 
         
Google Groups: alt.sources
new fortune cookies, part 2 of 2
Karl Lehenbauer
10/20/90
(...)
“Decaffeinated coffee?  Kinda like kissing your sister.”
—Bob Irwin (.(JavaScript must be enabled to view this email address))
 
Google Groups: rec.humor
Call for One-Liners  
Joseph Douglas McLain
7/4/95
(...)
Decaffeinated coffee?  Isn’t that kinda like kissing your sister.
 
Google Groups: rec.humor
[TAGLINES] Coffee
Dave Harper
7/3/96
(...)
... Decaff: Use it to sober up after drinking non-alcoholic beer!
... Decaffeinated coffee is like kissing your sister.
... Decaffeinated coffee?  Just Say No.
... Decaffeinated coffee?  Kinda like kissing your sister.
... Decaffinated coffee?  What’s the point of THAT!?
 
Google Groups: alt.callahans
Favorite Buttons (was Re: Learn the SECRET)
Rick Baldwin
9/25/97
One of my favourites has to be “Drinking decaf coffee is just like kissing your sister.”
 
Kinda says it all doesn’t it?
 
18 April 1999, Chicago (IL) Tribune, “Coffee, Coffee Everywhere” by Jon Bigness, sec. 5, pg. 8, col. 4:
“I only drink coffee for the buzz,” says Michael O’Neill, also a produce wholesaler. “Who cares about flavor? I drink it for the caffeine. Decaffeinated coffee is like kissing your sister.”
 
Google Books
563 Stupid Things People Do to Mess Up Their Lives
By Larry Samuel
New York, NY: St. Martin’s Press
2000
Pg. 132:
Decaf coffee
Drinking decaffeinated coffee is like kissing your sister.
   
19 March 2000, Ottawa (ON) Citizen, “OK, listen-up, stupid,” pg. C2:
Drink decaf: Drinking decaffeinated coffee is like kissing your sister.
 
24 November 2001, The Times-Transcript (Moncton, NB), “Moncton perks up!; Whether they take it black, double double or as a tall, skinny mocha latte, Metro Monctonians love their coffee: by James Foster:
“Decaffeinated coffee? Isn’t that like kissing your sister? What’s the point?” - Unknown.
 
Twitter
Silicon Wisdom‏
@siwisdom
Decaffeinated coffee?  Kinda like kissing your sister.
—Bob Irwin
11:47 AM - 22 Jul 2007
 
Twitter
quotes‏
@renamedquote
“Decaffeinated coffee is kind of like kissing your sister.”
Bob Irwin
5:30 AM - 19 Mar 2008
 
Twitter
sierramountaincoffee‏
@sierramtncoffee
remember, drinking decaf coffee is like kissing your sister.
12:32 PM - 6 Nov 2008
 
Google Books
Magic Apples:
Reflections to Mull
By Lee Steels
Xlibris LLC (Xlibris.com)
2014
Pg. ?:
Decaffeinated coffee is kind of like kissing your sister.
Bob Irwin