Here's what I know about myself: When I get stressed, games help me. They soothe me.
Maybe it's because the outcome of a game doesn't matter.
Maybe it helps me to feel a sense of control.
Maybe it's because my brain can't distinguish between real accomplishment (finishing boards) and fake accomplishment (rolling up a monster truck).
For these reasons, Katamari Forever calms me.
The story is ludicrous. Here's Katamari Damacy (the first game in this series) from Wikipedia:
"The game's plot concerns a diminutive prince on a mission to rebuild the stars, constellations and Moon which were accidentally destroyed by his father, the King of All Cosmos (WHILE HE WAS DRUNK). This is achieved by rolling a magical, highly adhesive ball called a katamari around various locations, collecting increasingly larger objects, ranging from thumbtacks to people to mountains, until the ball has grown great enough to become a star. Katamari Damacy's story, characters, and settings are bizarre and heavily stylized, rarely attempting any resemblance of realism."
(Parentheses mine)
That might help this part make more sense:
It's like a massage for my mind grapes.
Thanks, Japan.