Winston Churchill was known to talk about his "Black Dog" (depression) not sure if it came from there or somewhere before. Australia has a charity group run by bikers called Black Dog Ride, they do a lot of good things around Aus, I`ve been on a couple of ride outs with them, great way of raising awareness for people who are in a bad place mentaly, their mascot is...yep, a black dog, they called it Winston. Look them up, the founders story is a tough read.
The problem we have in this society is some people can only see the bad side of everything and twist meanings to suit an argument when there isn't one, the press are a great example.
As an aside to the above, we were on a Black Dog ride out in 2013 about 600 of us in total, with police escort for most of the ride, apart from when we were out in the bush about 100klms from anywhere, and the cops had set up a speed trap hidden in the bushes, my how we laughed. think I was riding about 3 different bikes that day.