Today's comics use four-letter words as a shortcut to thinking. They're shooting for that big laugh and it becomes a panic thing, using four-letter words to shock people.
On Update, the only real original thing was trying to take away the cleverness of the punchline and make it as blunt as possible.
I think the longer a sitcom is on the air, by necessity, the dumber the characters have to get: otherwise, they would be learning and growing, and they won't be funny, so they have to get more and more extremely whatever they are.
I don't know how many sacred cows there are today. I think there's a little confusion between humor and gross passing for humor. That's kind of regrettable.
Then Saturday Night Live spawns... well, everything right down to American Pie 9, where all humor has to be irrelevant, which can get a little tiring.
There is nothing worse than annotated humour.
After a while, a joke, if you say it too much, just becomes contrived, or fake-sounding.