They gave 108 female rats a moderate dose of caffeine before mating and found that it increased the rodents' libido. The caffeine shortened the amount of time it took the females to return to the males for another round of mating, BBC News reported.

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This boost in sexual behaviour was caused by caffeine's stimulation of the part of the brain that regulates arousal, the researchers said. They're not sure caffeine would have the same effect in humans.

"These rats had never had caffeine before. In humans, it might enhance the sexual experience only among people who are not habitual users," lead researcher Dr Fay Guarraci told BBC News.

The study appears in the journal Pharmacology, Biochemistry and Behaviour. – (HealthDayNews)

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January 2006
 

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