The title of this movie is a reference to a song Groucho Marx sang. We see him singing it in the movie—and that made me want to shut off this uninspiring film and get it on with some Marx brothers films. Melanie Lynskey plays Amy, a woman going through a divorce, living with her parents and starting an affair with a much-younger man (Christopher Abbott). Sarah Koskoff’s script goes through the motions, with the overbearing mom (Blythe Danner), the doting and confused dad (John Rubinstein), and so on. What it doesn’t do is offer anything new on the subject of breaking up and the crazy behavior it can cause. This feels like a movie you have seen a hundred times before. Lynskey is fine, but the script and Todd Louiso’s bland direction let her down.