'Saint Laurent': A look at the fabric of YSL’s life

Dreamy and impressionistic, full of debauchery, drugs, disco, and dazzling couture, Saint Laurent is a biopic that picks its moments, leaving backstory behind. If you don't know your fashion biz history going in, you may not know all that more coming out. Important info is left lying there, like taffeta swatches on the atelier floor.