No matter how hard Hollywood tries, Dane Cook is never going to be adorable. Though he’s known for his mildly edgy standup, someone in authority has decided Cook would be well-suited for fluffy romantic comedies, but like last fall’s Employee of the Month, Good Luck Chuck is so undistinguished that it feels like an extended screen test. Cook plays Charlie, a womanizing dentist who discovers that his exes always find their perfect mate right after dating him. He hopes to break that cycle with Cam (Jessica Alba), a klutzy nerd who works with penguins and unfailingly finds everything Charlie does delightful. Despite the R rating that allows for more nudity and swearing than your typical date flick, the directorial debut of longtime editor Mark Helfrich is the sort of offensively safe rom-com where the “colorful” supporting characters talk about boobies and doobies but the angelic central couple are ultimately just two goofy mush-heads looking for real love. It’s total malarkey, of course, and isn’t helped by Cook’s bizarre inability to act heartbroken or Alba’s ill-advised confidence in her gift for slapstick. Still, compared to his complete discomfort at playing someone other than himself, at least her bland hotness seems genuine.