When Chris Rock's daughter, Lola, came up to him crying and asked, "Daddy, how come I don't have good hair?" the bewildered comic committed himself to search the ends of the earth and the depths of black culture to find out who had put that question into his little girl's head. Rock visits hair salons and styling battles, scientific laboratories, and Indian temples to explore the way black hairstyles impact the activities, pocketbooks, sexual relationships, and self-esteem of black people. Celebrities such as Ice-T, Kerry Washington, Nia Long, Paul Mooney, Raven Symone, Maya Angelou, and Reverend Al Sharpton all candidly offer their stories and observations to Rock while he struggles with the task of figuring out how to respond to his daughter's question. What he discovers is that black hair is a big business that doesn't always benefit the black community and little Lola's question might well be bigger than his ability to convince her that the stuff on top of her head is nowhere near as important as what is inside. - skip ad - Genres: Comedy and Documentary Running Time: 1 hr. 35 min. Release Date: October 9th, 2009 (limited) MPAA Rating: PG-13 for some language including sex and drug references, and brief partial nudity. Distributor: Roadside Attractions, Roadside Entertainment Cast And Credits Starring: Chris Rock, Maya Angelou, Marvet Britto, Vanessa Bell Calloway, Rhonda Cowan Directed: Jeff Stilson Produced: Chris Rock, Nelson George (II), Jenny Hunter

When one of Chris Rock’s young daughters asked, “Daddy, how come I don’t have good hair?,” the comedian decided to investigate the complex, often troubled relationship between African-American women and their crowning glory. He had no idea what he was in for.

Embarking on a journey that would take him from beauty shops in the United States to a Hindu temple in India, from a hair show in Georgia to a product-manufacturing plant in North Carolina, Mr. Rock unearthed a world of physical, financial and psychological hurt. But though “Good Hair” embraces the pain, digging gingerly into wounds both political and personal, the film feels more like a celebration than a lament. Spirited, probing and frequently hilarious, it coasts on the fearless charm of its front man and the eye-opening candor of its interviewees, most of them women — including the actress Nia Long and the hip-hop stars Salt-n-Pepa — and all of them ready to dish.

In fact, one of the happy consequences of “Good Hair” should be a radical increase in white-woman empathy for their black sisters. Whether in thrall to “creamy crack,” a scary, aluminum-dissolving chemical otherwise known as relaxer (what it’s really relaxing, observes Mr. Rock astutely, is white people), or the staggeringly expensive and time-consuming weave (often available on layaway plan), the women in the film bare heads and hearts with humor and without complaint.

For the Rev. Al Sharpton, though, that’s part of the problem. “We wear our economic oppression on our heads,” he says, wryly bemoaning the migration of the multibillion-dollar, black hair-products business from African-American to predominantly Asian manufacturers. Oppression takes on a darker hue, however, when the film travels to India to unearth the unwitting — and unremunerated — suppliers of all that weave- and wig-ready hair: poor, devout women who offer it to their priests in a religious ceremony known as tonsure.

Competently directed by Jeff Stilson, “Good Hair” employs humor as a medium for insightful and often uncomfortable observations on race and conformity. The film’s only misstep is its fixation on the competitors in a flamboyant Atlanta hair show. Far more entertaining are the barbershop conversations in which ordinary men jovially gripe about their honeys’ hairdos; they’re a brotherhood joined in financial commitment and — thanks to hands-off-the-head decrees at home — emotional frustration.

On a recent “Oprah Winfrey Show,” Mr. Rock ran his fingers excitedly through his host’s luxuriant, natural tresses, unloosed in honor of the visit. “I’ve never done that to a black woman!” he marveled, while Ms. Winfrey, who used to threaten to shave her head when she reached her 50th birthday, giggled delightedly: at that moment, she was just happy not to have followed through with her threat.

“Good Hair” is rated PG-13 (Parents strongly cautioned). Chemical treatments and revolutionary sentiments.