Though censorship codes tried their best to separate couples into two twin beds, it didn't stop silent movie stars like Buster Keaton from busting his ass on screen for laughs just to get the love interest to look in his direction. It's an art form older than time itself, let alone the medium of film. People have spent their lives trying to understand it, perfect it, or even just get it. Sex is both one of life's greatest mysteries and one of its greatest sources of comedy.