Why did the blanket file a complaint?

This joke unwraps its humor through clever wordplay, specifically a pun. The phrase "being walked all over" is the star here, playing on its dual meaning. On one hand, a blanket, especially one left on the floor, can quite literally be stepped on by people. It's a common, albeit sometimes annoying, occurrence for an inanimate object.

However, the real punch comes from the figurative interpretation of "to be walked all over," which is a well-known idiom in the English language. This expression describes a situation where someone is being mistreated, disrespected, or taken advantage of by others. The comedy arises from the unexpected application of this very human experience of injustice to a simple, everyday item like a blanket, giving it a voice to complain about its plight. It's the delightful absurdity of an object experiencing a very human form of grievance that makes this joke a cozy chuckle.