Here is a great video on men's pocket handkerchiefs from RealMenRealStyle.com. Although the video is a couple of years old and many more men wear handkerchiefs today, I think they do a great job simply explaining and listing the 4 reasons why men should wear pocket handkerchiefs. Here they are:
1. A pocket handkerchief will allow you to stand out from the crowd of suits.
2. Wearing a pocket handkerchief shows that you pay attention to even the little details.
3. A pocket handkerchief allows you to introduce a splash of color to maybe an otherwise neutral suit and shirt.
4. Adding a pocket handkerchief helps dress up a casual jacket.