Just a thought - no need to add. Im taking a break from the neverending thesis, housesitting and watching their dog, and a puppy that's there for the weekend. The dog (golden retriever) loves to fetch tennis balls, and is persistent about it. Sometimes, its playful attitude can be annoying when its muzzling a few dirty tennis balls on your lap, insisting that you throw one. Sometimes youre just busy writing a paper. Well, this time, its playful persistence was tempered with the playful persistence of the puppy. While the retriever was trying to annoy me with tennis balls, the puppy was playing with the retriever by biting its legs and ears. This pissed off the retriever to no end and really cut into its schedule of playful persistence and dirty tennis balls. I couldnt help but think how the retriever just couldnt piece together how its playful persistence could be similar to the playful persistence of the puppy, constantly nipping at its ears and legs, and pissing the retriever off to no end. I guess dogs just dont get irony.