Because I Said So is no exception. Like nearly all of Lehmann's post-Heathers work, it's lazy and disinterested a hack-for-hire job any number of film-school grads could have put through its uninspired paces. Set in and around Los Angeles, the film stars Keaton as Daphne Wilder, a divorced, in-demand caterer whose booming wedding business has done little to persuade her youngest daughter, Milly (Mandy Moore), to tie the knot. And so Daphne, closing in on 60 and worried that Milly too might end up old and alone, does what any concerned parent would: She places an Internet personal ad seeking her ideal son-in-law and then proceeds to screen potential candidates for the job. Cue musical montage of variously unattractive, socially graceless, allergy-addled, and otherwise ill-suited applicants.
The cream of Daphne's crop turns out to be dreamboat architect Jason (Tom Everett Scott), who exudes WASP-y privilege and, as everyone save Daphne can see, might as well have asshole stamped on his forehead. The fly in Daphne's ointment, meanwhile, is a hipster musician named Johnny (Gabriel Macht), whose boho charms do little to endear him to Mom but who we know is really the guy to root for because he's chosen the artist's life over the world of corporate conformity even if it is a lifestyle made possible by the fact that Johnny still lives at home with Dad. Milly starts dating him, and from there, Lehmann and screenwriters Karen Leigh Hopkins and Jessie Nelson (the duo responsible for the equally insipid Stepmom) make some half-hearted stabs at door-slamming farce as they limp toward that inevitable "gotcha" moment in which all the characters discover what's really going on and Daphne's whole duplicitous house of cards comes tumbling down.
Despite the movie's best efforts to turn him into a sort of Chet Baker caricature, Macht has a sly charm and a natural chemistry with Moore (who is sufficiently charming, but little else, in a far less rewarding role than she had in Saved! and American Dreamz).
But Because I Said So is finally a work of comic desperation, and an especially cruel betrayal of Keaton, who looks radiant in her 60s yet keeps finding herself cast in roles that use her age as the foundation for cut-rate slapstick. First there was Nancy Meyers' Something's Gotta Give, in which the sight of a naked Keaton was enough to send Jack Nicholson into a bout of hysteria. Now there is this film, in which it is Keaton who's in panic mode, projecting her own romantic failings onto her child and, in one unfortunate recurring gag, getting her computer accidentally stuck on the same porn website (while her dog compulsively pleasures himself). And when Lehmann can't humiliate Keaton any further, what does he do? Why, assemble the cast for a group song, of course. Let this be a warning to all who would follow in his footsteps.