Capsaicin has been shown to improve circulation, speed, blood flow, and enhance endorphin release. When you want to heat things up, eat: Habanero, jalapeno, and cayenne pepper.
Nitric oxide is a chemical compound believed to promote sexual function in both men and women. Eat: organic dark chocolate with at least 60% cocoa content-have 1 once per day.
Zinc is known to be one of the key nutrients involved in enhancing libido and the production of sperm. Low levels of zinc have been linked to poor libido in women and low sperm count in men. Eat: Shellfish (particularly oysters-I guess there is some truth to that advice), dark green leafy vegetables, lean red meats, and turkey.