Our participants were male. They encountered a female target with whom there were led to desire either an exchange or a communal relationship. Each participant and confederate worked on a task. They were allowed to help one another. Tasks were assigned to enable the real participant to finish his task with materials to spare. The experimenter asked if he wished to give materials to the female. All did so and the confederate repaid him or did so and the confederate repaid him or did not with an extra credit point. Finally, under the guise of preparation for another task the male participants indicated their liking of the female confederate.