Charles Darwin believed that insects experience emotion. A new study strongly suggests he was correct, at least in the case of bees. Clint Perry of Queen Mary University in London and colleagues found dopamine-dependent positive emotion-like states in bees that were given sucrose and subjected to decision-making tests. This was not explicable simply in terms of the bees becoming more exploratory, and their apparent “good mood” was abolished by the dopamine-antagonist fluphenazine. The work opens up opportunities for understanding emotions in simpler organisms and for studying how emotional states affect decision-making in animals.