“Why did the printer go to the gym?”/“To get toner.”

A gym riddle is:
   
Q: Why did the printer go to the gym?
A: To get toner.
 
The joke was posted on Twitter  on February 8, 2013, and on Reddit—Jokes on December 28, 2017.
 
“The man leaned on the printer cartridge because he wanted to tone up his abs” is another “toner” joke.
   
     
Twitter
Meg T‏
@megloveswords
Why did the printer go to the gym? To get toner! #joke #icrackmyselfup
12:18 PM - 8 Feb 2013
 
Twitter
Patrick‏
@Patrick65857661
#ccjokes #pun Why did the printer go to the gym? 
To get toner!
12:42 PM - 17 Feb 2016
   
Reddit—Jokes
Why did the printer go to the gym?
submitted December 28, 2017 by spydeewhydee
To get toner.
 
Reddit—Dad Jokes
Why did the printer go to the gym? (self.dadjokes)
submitted January 12, 2018 by spydeewhydee
To get toner.
 
Twitter
keepingitcreel‏
@Keepingitcreel
Why did the printer go to the gym? To get toner.
8:57 PM - 11 Jan 2018