I am naturally blonde, gets a little darker as I get older, but almost all my random hairs are PITCH black
AND I have two hairs that grow out of the same hair follicle on my stomach, they are black!
For awhile I was also having problems with black kinky hairs growing out of the top of my head, straight up and kinky like a pub hair And I won't even mention the booby hairs

Glad to know I'm not the only one! I have a hair that grows out of the left side of my neck. At first, it is black and really stiff and is extremely hard to pluck out. The longer it gets, it loses it's color & goes gray. It's really odd. I try to catch it early on when it's black and pluck it out or else it takes forever to find it!

Ever so often I find a two inch long hair right in the center of my forehead. I have pretty white skin but I have black hair, so body hair shows up a lot if I don't shave or wax it off -_-
I always laugh when i see it because I know it wasn't there when I went to sleep a few hours before.