Why the Beanie ?

I totally understand that the guys in my hometown wear beanies... Our ancestor are the first who wore the ''tuque'' which is now called a ''beanie'', furthermore it's freaking freezing...

Here's a pic for the sceptic in you:

After that I only remember the grunge in early 90's wearing beanies .. there is a missing link ...

Whatsoever, the point is why LA guys wear beanies ??? It's always hot and sunny ..To hide a early baldness ? By laziness or not show there dirty hair ?

On sale at Urban Outfitters...