Why do northeast children always lick iron gates with their tongues in winter?

I don't know if your friends in Northeast China have been warned by their parents since childhood that you should never lick some iron gates and railings with your tongue in winter. Anyway, I have a friend who was warned by his parents since he was a child.

I wonder if anyone has heard that some people on the Internet call their friends Lao Tie. You may not know the origin of Lao Tie. In fact, Lao Tie mentioned here is from the northeast, because some children in the northeast were naughty when they were young. Often parents are not allowed to do things, and they are curious about those things. For example, my friend in mid-September was often warned by his family not to lick the iron gate in winter when he was a child. But their curiosity always drives them to death. When he was a child, he experimented with one of her good friends. What would happen if he licked the iron gate with his tongue?

Then there is no doubt that it is stuck. It can be said that it hurts to scream. Moreover, sticking it on the iron gate is a humiliating world, and basically people passing by will laugh when they see it. At this time, the two were embarrassed until the adults came to save people. There are many such children in the northeast, who don't listen to the warnings of adults in winter and lick the iron gate for death. Therefore, people who lick iron gates together in the northeast are called iron children. So why do sweets get stuck when the temperature is very low?

Actually, it's the same as licking popsicles. I don't know if you have the experience of sticking your tongue with popsicles in summer, but I have. Because the tongue is hot, it will stick to cold objects. Everyone can have a chance to try it when eating popsicles. As for children's frequent licking, it may be driven by curiosity.