The titles of Damien Hirst‘s spot paintings give them a slightly menacing, as well as a dangerously attractive, air: Cocaine Hydrochloride, Morphine Sulphate, Bovine Albumin, Butulinium Toxin A. Their relentless, insistent brightness feels almost bad for you. No wonder one group of paintings is called Controlled Substances. Yet they have no discernable secrets, and that’s part of the deal. Nothing more is revealed, however long you look. They’re as unsatisfying as cigarettes, calming but addictive. Avoid prolonged exposure.