I've never experienced those kind of temps before; it gets cold where I'm at, but not this cold, not in my lifetime at least. Because I'm backwards in the head, I wanted to experience this. So I stepped outside wearing nothing but shorts and a long sleeve tee. I stood out there for several minutes, and, strangely, the cold was not as intense as I thought it would be. The wind bit my skin and the chills infiltrated my lungs, but it was not unbearable. Ultimately, my feet were what forced me back inside. I was barefoot in almost-knee-deep snow, so that obviously hurt a lot.
Tl;dr: I'm not a "normal" human being.