Why does my tongue get stuck on metal in the winter?

Why does my tongue get stuck on metal in the winter?

Professor Gizmo (Amazing Science Presentations) gives expert video advice on: What is my body made of?; Why do we get "goose bumps"?; How do I catch colds? and more...

In winter in cold climates, the metals get so cold that if you have any moisture on your lips or on your tongue or even on your fingers and you touch that metal that's that cold, the water actually freezes. Now, I had this happen to me when I was young. I was going down a hill on my sled. I got to the bottom. I was just kind of laying there, enjoying the wonderful winter day. And my lip was wet, and I put it down, rested my head on the sled, and it hit the metal part of the sled, and it froze there. I lifted my head up and it ripped, and I was bleeding. And it's only because the metal was so cold that my moisture on my lips caused it to freeze and when I moved away it ripped the skin.