Cold humor? Black humor? What does it mean?

Because most of the cold humor is boring, the content is strange.

It has little practical significance, so some people become less cold the more they hear cold humor. The reason is opposite to the one above that is unexpected to the listener. When the listener has a negative attitude towards cold humor, after listening to the first half of the content, the listener will have a psychological hint that the joke will have an extremely boring and unfunny "second half". At this time, the listener will not be curious about the topic and will not focus on the joke. The result is that the thinking process of "concentration and thinking engagement" is shortened or absent. At this time, the listener will not only not feel cold, but will feel that the person who said the cold humor is boring and has nothing to do.