This kitty eats via a pair of chopsticks and its owner's hands. S/he (I'm not sure?) stands on the hind legs and gobbles up every bite of food passed their way. The YouTube description says they use chopsticks and toothpicks to feed kittens and it works great for training them to sit straight up. I don't know about the other cats, or how this is particularly "necessary" train them to do, but I do find it adorable.
One of our kitties loves to sit up similar to this to be handed treats. Never thought about using chopsticks, though. I suppose I'd have to master feeding myself with chopsticks before I could feed a starving kitty, though.