One of Oliver's nicknames is Mr. Meowster. He likes the sound of his own voice, and he uses his voice a lot. He just starts, for no apparent reason, and continues until he goes back to his cat napping. Sometimes it is to let us know that the food bowl is empty, but mostly, it is just to let us know he is there, at least as far as we can tell.
Mr. Meowster does not approve of paparazzi.
He really wants to be with us in the evenings, when we are in the living room, and he really wants to go out on the deck and into the yard to eat grass. Miikka likes to chase Oliver, when he notices that Oliver is in the room. Too often, Meowster sabotages himself through his incessant meowing. If he would just stay quiet, Miikka would ignore him - I know this because on the rare occasions Oliver refrains, he is left unmolested. But Oliver is our kitty of very little brain, so he never quite makes the connection. Sigh.