Valentine's Day is a time to explicitly acknowledge your love for the people that make you happy--your true brothers and sisters whose virtues bring you selfish pleasure and whose spirit you share. The commercial nature of the holiday is a consequence of its egoistic nature, but objects are means not ends. Your values are the ends. You give flowers because the smile they put on her face is an unmistakable sign of her joy. And her joyous experience, her elation at the realization of your devotion, fills you with the unmistakable warmth of inviolate self-esteem.