“Why is 6 afraid of 7?”/“Because 7 is a registered 6 offender”

A children’s number riddle is:
 
Q: Why is 6 afraid of 7?
A: Because 7 8 (ate) 9.
 
A popular variation is:
 
Q: Why is 6 afraid of 7?
A: Because 7 is a registered 6 offender.
 
“Why is 6 afraid of 7? Because 7 is a registered sex offender” was posted on Twitter on September 20, 2010. This variation has been printed on GIFs.
 
“6 was afraid of 7 because 7, 8, 9, but why did 7 eat 9?”/“Because you’re supposed to eat 3 squared meals a day” is a related joke.
   
 
Twitter
hail zorp
‏@whitxtwigz
Why is 6 afraid of 7? Because 7 is a registered sex offender.
4:30 AM - 30 Sep 2010
 
Twitter
⚾️Neil Foot ⚾️
‏@NeilFoot
@SarahKSilverman why is six afraid of seven?
Because seven is a registered sex offender.
2:02 AM - 28 Oct 2010
 
Twitter
Ariana Singer
‏@arianasinger
Why is 6 afraid of 7. Because 7 is a registered 6 offender 😛 http://myloc.me/ebeuG
11:31 AM - 13 Nov 2010
 
Twitter
Adam Ferguson
‏@ConsumedByFilm
@pearlypops why is 6 scared of 7? because 7 is a registered six offender.
6:50 PM - 22 Nov 2010
     
Bodybuilding.com
Reps to whoever can answer “Why was 6 afraid of 7” most inappropriately…
SlippyFist
11-27-2010, 03:37 PM
because 7 is a registered sex offender.
 
Google Groups: FLoEG
FLoEG Newsletter: Issue Three
Eric Brower
6/5/13
Why is 6 afraid of 7?
Because 7 is a registered six offender.
 
reddit
Why is 6 afraid of 7?
submitted March 24, 2015 by dkobjerowski
Because 7 is a registered 6 offender.
 
YouTube
Jokes - Why was six afraid of seven? Because seven is a registered six offender.
jokesus
Published on Oct 5, 2015
Joke :
Why was six afraid of seven?
Because seven is a registered six offender.