uh...what's the joke? like "your mother was good last night" or something?
entp humor is a little bit in your face and irreverant. plays on not behaving properly, being obnoxious, word play. entp's love to laugh and make other people laugh, usually by noting rules of a situation and how they may be successfully broken. Looking at the opposing side of something and drawing it to its most extreme. Or dead pan.
a favorite: why did the monkey fall out of the tree?