Pure, unadulterated, healthy evil. Its more evil than my snuggly happy cats.
See it gets you like this. Its served in small portions. Mouthfuls. So if you go out to get lunch and happen to decide at the same time to get lunch for tomorrow as well, you have two average meals right there. So you go home, and you have your lunch. You enjoy it immensely. You're sated, but not terribly full. You look over and see tomorrows lunch. You figure that it was so tasty, and there's room for another mouthful.
One thing leads to another. And before you know it, you've got two empty sushi boxes in front of you and you're reclining back, unbuttoning the top button of your jeans and letting out a soft belch.
Pure, unadulterated, healthy evil.