"6 Month Rule," by Blayne Weaver Tyler (Blayne Weaver), a successful fast-food photographer, conducts his romantic life according to an unwavering set of rules, the most important being that any woman should be forgotten after six months. Hence, "6 Month Rule," an ostensible romantic comedy that's really just a grating portrait of an irredeemable jerk. He's a type we encounter all too often on big screen and small: the cocky player knocked sideways by the smart crush whose wardrobe and attitude owe more to Zooey Deschanel than Kim Kardashian. In this version, written and directed by Mr. Weaver, the punch is delivered by Sophie (Natalie Morales), a quippy free spirit with a rock-star boyfriend and the ability to spot a loser at a thousand paces. "She's an anomaly," Tyler explains when his best friend (a very good Martin Starr) wonders why Tyler doesn't simply apply his own rules - previously illustrated by a trite breakup montage featuring Tyler's castoffs - and walk away. For the audience, however, investment in his happiness requires surmounting the not inconsiderable barrier of his obnoxiousness, unalleviated by humor or humanity. It also requires tolerating the film's contempt for its secondary female characters, namely a harridan of an ex-fiancée (Jaime Pressly) and a lovelorn model (Vanessa Branch) who does little but lounge, Tyler ready, in her apartment wearing come-and-get-it lingerie. The only anomaly here is an 11th-hour burst of screenwriting gumption proving that Sophie's smarts are real. If only they had been shared by the rest of the film. "6 Month Rule" is rated R (Under 17 requires accompanying parent or adult guardian). Naughty words and really nice underwear.