A new study at the University of California, San Francisco found that male fruit flies that had been rejected drank, on average, four times more than those that had successfully mated. In the experiment, 24 male fruit flies were put in one of two situations — either in a vial with female fruit flies ready to mate or in one with female fruit flies who already had. Then, after four days, they were given the opportunity to choose between plain food and food that had been spiked with alcohol.
Though researchers expected all of the flies to prefer alcohol-laced food, they found that the males who had successfully mated passed on the boozy food. The rejected males, however, displayed a clear preference for it. On average, the rejected male flies "drank" four times more alcohol than those that had mated.
Though researchers expected all of the flies to prefer alcohol-laced food, they found that the males who had successfully mated passed on the boozy food. The rejected males, however, displayed a clear preference for it. On average, the rejected male flies "drank" four times more alcohol than those that had mated.

