Scientists over at Southwestern University are interested in the female libido, among others. With the aim to decipher the chemistry and brain structures surrounding sexual motivation they gave a number of lady-rats a dose of caffeine before mating to see if it had any effect on their behaviour. The result? They found that caffeine shortened the time it took for the females to go back for more after the first session. While one might think this could be the result of the energy boost caffeine provides, they ruled that out and rather attributed the effect to an increased stimulation of areas in the brain responsible for arousal.
The catch? Lead researcher Dr Fay Guarraci explains:
These rats had never had caffeine before. In humans, it might enhance the sexual experience only among people who are not habitual users.
Bad news for coffee addicts, good news for Rooibos drinkers.