Marmaduke destroyed his owner-family's mailbox (and probably a number of other things) during his afternoon walk with his owner-man. Owner-Man makes light of the mailbox situation to his wife, yet another example of how the bulk of their communication is a numb, disconnected and empty series of weak jokes and ironic understatements deployed in order to distance themselves from the horror and futility of spending their lives as the prisoner-slaves of their powerful, self-serving ogre of a dog.
This site has been a steady stream of amusement ever since I first stumbled across it a year or so ago. It's well worth browsing through the archives to find the tasty bits about Marmaduke, the Owner Lady, and frottage. If my cubicle neighbors were ever wondering why I randomly choke on laughter, this is it.
Another revision of the Sunday Funnies worth checking out is Garfield Minus Garfield, in which someone with access to Photoshop strips every Garfield cartoon of the fat, lasagna-loving cat, leaving Jon looking like a sad, delusional man with predictably humorous results. Check it out: