"Skipped Parts" is a watered-down version of Tim Sandlin's novel of the same name, the first in a wonderful trilogy about Sam Callahan's and Maury Pierce's unusual lives. I recommend reading the novel(s), where the two leads are 12, not 14, in the beginning and where the Wyoming landscape and Teton Mountains are just as much characters as they are a background for the movie.
Not only is the story watered down and written for cheap laughs and tears, but the pacing is unbearably slow. Jennifer Jason Leigh is clearly not capable of doing justice to the methodically drunken Lydia Callahan, as her portrayal is really more of a caricature than a character; and Tim Sandlin sadly did little justice to his own novel in this screenplay by down-playing Sam Callahan's inner life as innocent, hopeful commentator on the action of the novel/movie. Much of his biting and insightful humor is lost by removing Sam's commentary.
Read the book. It'll take more time, but feel hours shorter than this movie felt.