Sartorial Sense

I realize that everyone has a 'uniform' of sorts - especially for work. For example, I work in a business casual environment and therefore stick to khakis and solid or plaid cotton shirts. I usually do not get too caught up in what people where, but there is a strange guy in my office that I must comment upon.

There is this guy who wears black every day. Black plants and black button down shirts / mock turtle necks / or polos. It is very odd.

Is he a goth?

Is he in mourning?

Is it a fashion statement?

I don't understand, but I did notice that his screen saver is is 'star trek' themed. Better all black than a 'one-sie' Captian Kirk.