In Friday's issue of the journal Science, researchers propose a biological explanation for why “Not tonight, dear” may lead to “Gimme another beer.” If it proves true in people, it may help scientists find new medications to fight alcoholism.
One by one, these eager Lotharios were put into a container with a female that had just mated. So she was really, really not interested in doing it again anytime soon. She would run away. She would kick the male. She would stick out her egg-laying organ to hold him at bay.
After that experience, rejected flies were put in vials and given a choice of regular food or alcohol-laced food. They consistently went for the alcohol more than did the male flies that had just mated. In fact, they evidently got plastered.