“What did the sandwich say to the doorman?”/“Please lettuce in.”

A sandwich riddle was posted on Reddit—Badjokes on September 12, 2017:
   
Q: What did the sandwich say to the doorman?
A: “Please lettuce in.”
   
“Lettuce” sounds like “let us.”
 
     
Reddit—Badjokes
What did the sandwich say to the doorman? (self.badjokes)
submitted September 12, 2017 by angrymonkey
“Lettuce in.”
The sandwich had lettuce on it, I forgot to explain.
   
Twitter
Prince
@RafzEscobar
What did the sandwich say to the doorman?
....
Lettuce in 😭😂😂😂🥗🥗🥗
6:30 PM - 21 Jan 2018
 
Twitter
Aqilomundo
@bugsbunny_aqil
What did the sandwich say to the doorman?
Lettuce in
3:30 AM - 22 Jan 2018
 
Twitter
Steve.
@SteveMonk_
What did the sandwich say to the doorman.. “lettuce in..”
4:30 PM - 22 Jan 2018
   
Twitter
😉
@frankfallon41
Q   What did the sandwich say to the doorman
A   lettuce in
3:58 PM - 2 Feb 2018 from South Dublin, Ireland
 
Twitter
ShitJokes
@ShitJokes3
What did the sandwich say to the doorman?
Please lettuce in #jokes #lol #TheBachelor #LHHMIA
11:40 PM - 12 Feb 2018