Randy flies reveal how booze affect inhibitions

When male fruit flies were exposed to successive doses of alcohol, they displayed amorous behaviour towards other males.
rembarsays...

Layman's summary and the actual paper, although I'm honestly scared to think about how the media would jump on this. I can just see it now, on Fox News: "ALCOHOL TURNS YOU GAY ITS A CHOICE SCIENCE SAYS SO ALSO YOU RUIN THE SANCTITY OF MARRIAGE BETWEEN A MAN AND A FLY". Yikes.

The paper itself is damn interesting and amusing, particularly this bit from the discussion:
"Nonetheless, a consistent effect of ethanol on heterosexual behavior observed in our studies of flies and the previous findings in rats [7], [8] and humans [5] is the inhibitory effect on sexual performance. It is tempting to speculate that ethanol may act on similar cellular targets in different species. Comparing the ethanol's effects on heterosexual courtship and copulation, chronic ethanol has opposite effects on sexual arousal and performance of male flies, indicating that their underlying processes may be distinct. It is possible that adaptive changes induced by chronic ethanol exposure are necessary to enhance sexual arousal and may overlap with those underlying behavioral sensitization on disinhibited courtship."

From a sociological perspective, if it could be confirmed that the disinhibitive effect and increase in sexual desire is indeed the same on a cellular level cross-species, this finding would imply that the pressure among humans to continue semi-regular alcohol consumption in adolescence and especially young adulthood could have a physiological basis.

And in addition, to the increase in sexual desire but decrease in performance...therein lies the evil of alcohol. "But I want to! But I can't....but I want to!" Fate worse than death, I'm tellin' ya.

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