Explain the joke

Your friend sent you a meme and you don't get it? Random image has everyone laughing and you're too dense to understand? Verbal joke a friend said, and you wanna type it out and ask the internet what the punchline was? We've got you.
This happened to a coworker of mine last night. Too good not to share.
Server, waiter, waitress? Welcome home, take off your apron, have a glass, and let's chat about work, cause c'mon, as much as you act like you don't wanna talk about it, you do. I know! Read the rules before posting and commenting. Check out these related subreddits! [r/KitchenConfidential](www.reddit.com/r/kitchenconfidential) /r/chefit /r/foodThere is no red in this pic. It's only blue, black, and white. Your brain fills in the red. Zoom in to check.

A subreddit to highlight old and new optical and visual illusions.
Can we take a moment to appreciate Janelle's"f you's"to kody

A subreddit about the train wreck TLC show Sister Wives
Roadtrip!

A sub-reddit for the fans and critics of the show It's Always Sunny In Philadelphia. Discussion of the show, pictures from the show and anything else.
After 30 years in this industry, I finally had the worst table ever.
Server, waiter, waitress? Welcome home, take off your apron, have a glass, and let's chat about work, cause c'mon, as much as you act like you don't wanna talk about it, you do. I know! Read the rules before posting and commenting. Check out these related subreddits! [r/KitchenConfidential](www.reddit.com/r/kitchenconfidential) /r/chefit /r/foodOver reaction much!?

You know how there are people who are genuinely shocked by the consequences for their words and actions? Even when the consequences are really obvious? Share the stories here! *This is not an advice sub*