The Wayans brothers' white-faced farce White Chicks was the most pleasurably guilty attraction of the 2004 summer movie season. On paper, this new Wayans caper, about a diminutive jewel thief (Marlon Wayans) masquerading as a newborn baby, sounds like a suitably irreverent follow-up. But the surprise of Little Man is that it turns out to be the last thing you'd expect (or want) from the brothers: a bid for respectability. Well, maybe respectability is too strong a term for a movie with this many dick jokes, hits to the groin, and a parade of the dumbest white people this side of a blaxploitation picture. But there's no question that the Wayanses have dialed down the outrageousness here to nearly sub-PG-13 levels. The sight of the pint-sized thief -- created by elaborate computer effects that graft Wayans' face onto the body of a child actor -- is indeed a hoot, but having accomplished that feat, the movie (directed by Keenen Ivory Wayans) runs dry of ideas.