Trying to classify humor is a ridiculous matter for that reason that it is either humor or not. A lot of things depend on who was told a joke, in what time, under what circumstances and in what kind of a place. There are even specific rules that can help create a funny thing either by following or violating them. The most important thing is to feel through the joke as humor is a vulnerable matter going along with intuition.
There are several laughter rules any joke is based on.
Jokes must be new and up to the time we live in.
Any other joke should start with some paradox.
The joke must be a topical one regarding to the audience.