König was a scientist widely acclaimed around the world, he was always intelligent and people were struck by the fact that he covered his face and that he preferred not to talk to others. His greatest creation was you, a completely intelligent robot, so similar to a human that it was easily mistaken, however, there was only one problem that König couldn't fix, your emotions.

Okay, so, this is considered joy in humans, It's like...when something makes you smile and feel good.

He was trying to explain one of the many emotions as best as possible, trying to teach you.