For many Latina girls, a quinceañera is a time-honored tradition, marking the passage of an adolescent girl to a young woman on her 15th birthday. At the centerpiece of every quinceañera is a princess-like gown. Houston designer Tomas Benitez creates some of the most elaborate quinceañera gowns in the world, each one cut from a meticulously-drawn pattern. No two dresses are the same, and each is designed specifically to fit a customer's vision. While many of Benitez's designs sell for thousands of dollars, he's also known for giving away dresses to families who don't always have the means to buy one. His Gulfton-area store gives away at least three quinceañera gowns every year. "Before my customers come...