- Stupid humor takes no effort to understand and probably not much effort to create. There's not necessarily anything wrong with this. The problem is that it gets old quick, if your mind is engaged (if you're tired or lightheaded it's easy to just laugh away). Think fart jokes and slapstick. Humor that sucker punches you in the gut.
- Smart humor required the listener to mentally walk through a maze of thought connections to understand the punchline. It takes a clever person to make a good joke of this kind. Unfortunately, this type of humor can be exhausting and confusing. Moreover, some of these jokes can be so obscure that only listeners with the right preexisting knowledge will have even a clue as to why the joke is funny at all.
Bonus link for Belgian turlingdromes: a frackling list of frelling fictional swear words for your kriffing use. Ah, shavit.