In the following video, I noticed that the guy on the left had not only his collar unbuttoned but also the next button down, leaving a glimps of chest hair. Then I noticed the guy on the right had his shirt open one button down as well. Then I noticed that the guy in the middle did likewise. Is this something that has been going on for years, and I've missed it? If so I feel rather a fashion disaster having gone around all this time with only my collar button undone. Can someone here who's up on the latest in men's fashion please enlighten? Will I become a "young Turk" if I leave this button undone?