This Chika Anadu film is not out to dazzle the audience, but to present a complicated picture of contemporary Nigerian culture. Though the family at the center of B for Boy is modern (the wife works for a TV production company, the husband is a member of the managerial elite), they cannot escape the deep pull of the old, rural ways. The wife is pregnant, and the in-laws are demanding that she give birth to a boy. If she does not, they will make their son, who has just turned 40, marry a second wife. Africans sometimes. (SIFF Cinema Uptown, 511 Queen Anne Ave N,, 8:30 pm, $12/$10 SIFF members)