cures
Explanation
The Joke
Someone is knocking on a door, cheerfully saying "Knock knock!" The person inside the house stares in silence ("..."), prompting the knocker to repeat "KNOCK KNOCK!" more insistently. The person inside, visibly anxious, whispers to themselves: "Maybe if I turn on the shower he'll hear it and go away." The caption reads: "Social anxiety has devastated the knock knock joke format."
The comic takes the classic knock-knock joke setup -- which requires the person inside to enthusiastically respond "Who's there?" -- and imagines what happens when the recipient has social anxiety. Instead of playing along, the anxious person treats the knock-knock joke exactly like an actual unwanted visitor at their door: something to hide from and hope goes away on its own.
The Humor
The humor comes from the collision between a joke format that demands social participation and a person who wants nothing less than to participate socially. The knock-knock joke is perhaps the most interactive of all joke formats -- it literally cannot proceed without the other person's cooperation. By placing a socially anxious person in the responder role, the comic creates a perfect deadlock: the joke-teller cannot deliver their punchline, and the listener would rather pretend to be in the shower than say "Who's there?" The detail of turning on the shower is particularly funny because it is such a specific, recognizable avoidance tactic -- not just ignoring the door, but actively creating an alibi for why you cannot answer it.