Because I Said So isn't a movie, as such; it's a poster, a trailer, a pitch, a marketing plan. A movie has a script; Because I Said So doesn't have one of those. Instead, it's got a collection of bland situations, silly dialogue and unnecessary complications. I don't think anyone actually wrote Because I Said So; I think that some Hollywood artificial intelligence think-tank instead fed DVD box sets of The Gilmore Girls and Sex and the City into a computer, along with Pottery Barn catalogs for roughage, and this movie -- where the character's wardrobes are given more thought than their motivations, and where the look and accoutrements of their apartments are better-defined than their back stories and desires -- is what came out the other end.
Daphne (Diane Keaton) is a successful businesswoman who's raised three daughters -- oldest Maggie (Lauren Graham), middle daughter Mae (Piper Perabo) and youngest Milly (Mandy Moore). Maggie and Mae are married; Milly's romantic life is a dreadful roller-coaster of ups and downs, giddy possibilities and glum dumpings. Daphne does what any person in a cliché romantic comedy would do -- namely, posting an online personal ad so that she can interview candidates to be involved with her daughter and then help them meet Milly in carefully-engineered 'coincidences' so that Milly will be unaware her mom is playing both Cupid and Cyrano.