The Molecule of More: How a Single Chemical in Your Brain Drives Love, Sex, and Creativity―and Will Determine the Fate of the Human Race

by Daniel Z. Lieberman

Now let’s say it’s Saturday night, and an addict’s brain is expecting the usual Saturday-night “treat,” cocaine, but it doesn’t come. Just like the croissant-deprived office worker, the drug-deprived addict will feel resentful and deprived.