VIDEO : Bradley Cooper Breaks One Of The Cardinal Rules of Men's Fashion

Bradley Cooper keeps doing up the bottom button on his blazer. It breaks suit etiquette that's been tradition since the days of King Edward VII. It also looks bad. As Jack Stammers of Jack Davison Bespoke tailors in London tells INSIDER, doing up your bottom button can pull the blazer awkwardly around the midriff, which looks unflattering. It's not the first time the actor/director has made the mistake. Despite his momentary lapse, Cooper is normally something of a style icon. Will Bradley Cooper ever learn?