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- Ginseng: The word ginseng means "man root." So it's likely that ginseng gained its popularity as a sexually enhancing herb via its similarity to the male, um, organ. While it is true that the root has a mild stimulating effect, like caffeine, there is no solid evidence that ginseng has an effect on human sexuality. But what the heck — increase your energy, and your sex life will follow suit.
- Yohimbine: Taken from the bark of an African tree, yohimbine is believed to work by stimulating the nerve centers in the spine that control erection. Although even the FDA found its studies on animals to be positive, there is still no scientific proof that yohimbine works on human beings. But some gentlemen swear by yohimbine, and like I always say: If it's good for the goose, then slip on a condom and give it to the gander.