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With ecstasy in their system, the five octopuses spent far more time in the company of the same trapped male they once shunned. Even without a stopwatch, the change was obvious. Before the drug, they explored the chamber with the other octopus very tentatively. “They mashed themselves against one wall, very slowly extended one arm, touched the [other animal], and went back to the other side,” Dölen says. “But when they had MDMA, they had this very relaxed posture. They floated around, they wrapped their arms around the chamber, and they interacted with the other octopus in a much more fluid and generous way. They even exposed their [underside], where their mouth is, which is not something octopuses usually do.”