In a recent study, it actually increased the sex drive of over 80% of those who took part in the trial.

Ginkgo is said to be helpful in sending blood flow to the genital area, it relaxes the blood vessels and is said to boost the flow of blood which improves and maintains the erection. In research half of those men who used ginkgo showed beneficial effects after 6 to 8 weeks of treatment and after 6 months half had regained full potency. It is also said to boost the erection and increase the sex drive in smokers and those who suffer fatigue.  

http://naturalhealthhealing.blogspot.com.au/2007/07/spice-up-your-sex-life-with-natural.html