“You’d think the self-checkout lanes would have more mirrors”

Many stores have “self-checkout” lines, but they’re not to check out one’s self. A joke was posted on Twitter by Cameron on May 2, 2012:
 
“You would think the self checkout aisle would have more mirrors.”
 
“You’d think the self-checkout lanes would have more mirrors” was posted on Twitter by Men’s Humor on the following day.
 
     
Twitter
Cameron‏
@Cameron_Slade
You would think the self checkout aisle would have more mirrors.
2:00 PM - 2 May 2012
     
Twitter
David Holman‏
@HolmanTravel
You’d think the self checkout lanes would have more mirrors.
3:39 PM - 2 May 2012
 
Twitter
Men’s Humor‏
@MensHumor
You’d think the self-checkout lanes would have more mirrors. #ZING
6:30 PM - 3 May 2012
   
Twitter
John Galt‏
@Vito_McAwesome
RT @funnyoneliners: You’d think the self-checkout lanes would have more mirrors. #ZING RT @MensHumor
7:37 AM - 4 May 2012
 
Twitter
Bill Murray‏
@BiIIMurray
You’d think the self checkout lanes would have more mirrors.
10:18 AM - 15 Aug 2014
   
OnePlus.net
make me laugh and receive an invite
mythinkhouse, Aug 18, 2014 :
You’d think the self checkout lanes would have more mirrors.
   
Twitter
Greg A. Bucher‏
@GregABucher1
You’d think that the self checkout line would have more mirrors.
1:57 AM - 19 Aug 2017