Women become beautiful when they fall in love. If someone looks more beautiful than usual, people say, “You look gorgeous. Are you in love?” They usually say it half in joke, but it does have a scientific reasons. First of all, when a woman falls in love, dopamine causes chemical action in the cerebrum. It makes her feel happy, and she laughs. Second, when she laughs, endorphin is made in the body. It helps lower the level of stress. Because the body feels less stress, she becomes carefree. Then she can have a high metabolism because toxin from stress has been reduced. Plus, a high metabolism makes her skin smooth, soft, and fair. Finally, a woman makes every effort to look beautiful to her boyfriend. She cares a lot about her fashion, makeup, and even manner. All those changes of inside and outside of her cannot help making her beautiful.