“I never question myself. Why should I start now?”

“I never question myself. Why should I start now?” is a jocular saying that was posted on Twitter by “KD” on July 1, 2010. The second sentence jokes on the first.
 
   
Twitter
KD
‏@KineticalDummy
I never question myself.
Why should I start now?
8:19 PM - 1 Jul 2010
 
Twitter
wise young fattie 🦋
‏@SimoneMariposa
“I never question myself. Why should I start now?” - @kinecticaldummy (the best) http://tumblr.com/xuqck9k8y
8:20 PM - 1 Jul 2010
 
Twitter
funny humour
‏@funnyhumour
I never question myself.
Why should I start now?
10:19 AM - 2 Jul 2010
   
Google Books
5,000 Great One Liners
Compiled by Grant Tucker
London: Biteback Publishing
2012
Pg. ?:
I never question myself. Why should I start now?
 
FASAB (Fight Against Stupidity And Bureaucracy)
I Never Question Myself. Why Should I Start Now?
July 24, 2014
 
Twitter
Bad Joke Cat
‏@BadJokeCat
I never question myself. Why should I start now?
1:55 PM - 12 Sep 2014
 
Twitter
Shit Jokes
‏@ShitJokes
I never question myself.
Why should I start now?
2:51 PM - 4 Jun 2016