Amusing view of the experiment. Mice implement 'social rules' for long-term rewards. Mice begin each experimental session from the central area (start zone) and then learn that a blue light on the left or right areas corresponds to a 'dose of pleasure', which is delivered via wireless electrical brain stimulation (pleasure dose) via a headset connected to the pleasure area in their brain. The research team observed that mice develop a 'social rule' by splitting the territory: one mouse gets the pleasure dose available in the left zone, and the other mouse in the right zone. Among all tested mice 60% (23 out of 38 mice) waited for their turn. Mice that respect this rule had also more rounds during the experiment, and thus more reward time in total. These mice reached a win-win situation that brings long-term rewards for both mice.