About a week ago I was on the family ranch in the Texas hill country walking our little dogs with my stepmother. All of the sudden, a huge pig bolted out from the brush on one side of the road. Our largest, but still small, dog started after the pig down another road.
Behind me was a woman and two small domesticated animals, before me was a large potentially dangerous wild animal weighing at leas 200 pounds. For thousands of years, it has been the established policy of male-gendered hominids in my position to take up whatever fire and/or sharp things were at hand and use those things against the potentially dangerous animal. Evolution payed off, I had a primordial understanding of the course of action which I was to take.
At the time, I was carrying a Beretta 9mm pistol in my pocket which I took for exactly the situation that I found myself in at the moment. I went for the pistol in my pocket. After a moment, I realized there was a problem...the hammer was caught on the top of my pocket. After struggling with my pocket for about 15 seconds while being yelled at for failing to brandish it soon enough, I finally got it out, loaded it, and let off a shot at the ground in a field to my right. The dog ran in one direction and the pig in another; so I wasn't completely unsuccessful.
It is rare indeed for one to have a gun at the exact moment that one is in need of a gun. But it doesn't really do a whole lot of good unless you can get it out of your pocket.
I bought a holster.