So, they would rather get the dopamine hit from getting zapped than eat. I guess that's kind of how a lot of drugs work too though. Archive: https://archive.today/PDapW From the post: "The research team, which included DPAG DPhil student and second author Lucille Duquenoy, used optogenetics to activate a subset of reward-encoding dopamine neurons together with an odour. In the confocal microscopy image above, these dopaminergic neurons (in white) target the mushroom body (in blue), the centre of olfactory learning and memory in the fly brain. Prior work suggests that these dopamine neurons are highly diverse and ordinarily convey different reward types as parallel teaching signals to the mushroom body.   "