“Why do we put candles on top of a birthday cake?” (joke)

A popular joke about birthday cake is:
 
Q: Why do we put candles on top of a birthday cake?
A: Because it’s too hard to put them on the bottom!
 
The joke has been cited in print since at least 2006.
 
 
Yahoo! Answers
Anyone know any short quick birthday jokes?
Best Answer
wouldn’t you want to know… answered 9 years ago (Jul 12, 2006—ed.)
(...)
Q. Why do we put candles on top of a cake?
A. It’s too hard to put them on the bottom!
       
jokesiteexample.com
Category: Birthday jokes
Date Added: 11/10/2007
Rating: not yet rated  
Views: 1092
Joke: Why do we put candles on top of a birthday cake? Because its too hard to put them on the bottom!
 
Twitter
CJdoggirl
‏@CJdoggirl
@sally__ann #bdaypicnic Why do we put candles on top of a birthday cake? Because its too hard to put them on the bottom.
5:46 PM - 2 Aug 2009
 
Google Books
How Much Does Your Head Weigh?:
The Big Fat Book of Facts
By Marg Meikle
Toronto, ON: Scholastic Canada
2010
Pg. 144:
Why do we put candles on top of a birthday cake? Because it’s too hard to put them on the bottom.
 
Twitter
Shindigz
‏@Shindigz
Q: Why do we put candles on top of a birthday cake? A: Because it’s too hard to put candles on the bottom! http://www.shindigz.com/candles
11:43 AM - 8 Mar 2010
 
Children’s Party Supplies
Birthday Riddles
Michelle Eckles - Tuesday, November 02, 2010
(...)
Q: Why do we put candles on top of a birthday cake?
A: Because it’s too hard to put them on the bottom!
 
Google Books
The Mammoth Book of Really Silly Jokes:
Humour for the Whole Family
By Geoff Tibballs
London: Constable & Robinson Ltd.
2011
Pg. ?:
Why do we put candles on top of a birthday cake?
Because it’s too difficult to put them on the bottom.