An effective tool for a woman in achieving a bright orgasm. The fact is that evening primrose oil contains prostaglandin, which has hormone-like effects. It affects the smooth muscles of the reproductive system, which contract during orgasm, relaxing them. The muscles become more sensitive and contract much more actively during orgasm. Moreover, smooth muscles contract during orgasm in both women and men. Probably, evening primrose oil can make a man's orgasm brighter.