Happiness: Why are you crying?
Confusion: I don't know.
Happiness: Are you sad?
Confusion: Not exactly.
Happiness: Mad?
Confusion: No. Not at all.
Happiness: I know.
Confusion: You do?
Happiness: Yeah. Remember that time I rode that roller coaster with you?
Confusion: The grown-up one?
Happiness: Yeah. Remember at the end how I cried? I was so glad it was over.
Confusion: You felt relief.
Happiness: Yeah. But what's that other word you like to use?
Confusion: You mean, gratitude?
Happiness: Yeah. Gratitude. That's why you're crying.