Why did the blanket file a complaint?

This joke unwraps its humor through clever wordplay, a classic comedic mechanism. The punchline hinges on the dual meaning of the phrase "walked all over." On one hand, blankets, especially those casually tossed on the floor or used as rugs, are quite literally stepped on and walked across by people. It's a common, if sometimes slightly disrespectful, interaction we have with our cozy coverings.

However, the real comedic twist comes from the idiomatic use of "walked all over," which means to be treated poorly, taken advantage of, or disrespected. By personifying the blanket and giving it the ability to "file a complaint," the joke playfully suggests that the blanket is feeling the metaphorical sting of being mistreated, even though it's only experiencing the literal act of being walked on. It's a silly, relatable scenario that highlights the everyday indignities of inanimate objects, all thanks to a well-placed pun.