On the other hand, if the partner had played unfairly against them before the session, the subjects felt cheated, and seeing the other in pain had less of an effect. The door to empathy had shut. For the women, it was still partially open—they still showed mild empathy. But for the men it closed completely—in fact, seeing the unfair player getting shocked activated the pleasure centers in men’s brains. They had moved from empathy to justice and welcomed the punishment of the other. Their main sentiment was Schadenfreude.
