" harder time suppressing their appetite. Having depleted their willpower, they ate considerably more ice cream—more than half again as much—as the women who’d been free to cry during the film. This is, of course, just one more demonstration of ego depletion. Still, it bears repeating that eating and dieting can be affected by things that seemingly have no connection to them. Trying to hide your feelings while watching a movie drains your willpower, rendering you more likely to overeat later on in a separate, ostensibly unrelated context. "

― Roy F. Baumeister , Willpower: Rediscovering the Greatest Human Strength