As its name indicates, Horny Goat Weed is most renowned for its use as an aphrodisiac. According to legend, this property was discovered by a goat herder who noticed sexual activity in his flock after they ate the plant. It is now used to increase libido, assist impotence, premature ejaculation and incontinence. It is also used for rheumatism and chronic lower body pain. Horny Goat Weed dilates blood vessels and increases circulation, which helps to warm cold extremities.