In the new film 'I Love You, Man,' Paul Rudd plays a man who must find a friend to be his best man at his upcoming wedding. It's been called a "bromance' - the union of the words "brother" and "romance" that is loosely defined as a "male crush" or a non-sexual love affair between two heterosexual males. Turns out there have been bromances for a good while now - real-life ones and those on the screen. Here are photos.