I saw “Funny People” yesterday and I had pretty much the same question. The main characters spoke pretty much without dirty words in normal life, but as soon as they got on stage, every other words was “fuck” or “shit.” It’s like they get inarticulate and just let the id take over. Maybe it works because the audience is usually in a club of some kind, and they are all drunk.
I’m not one who laughs just because a comedian sprinkles their spiel with swear words. In fact, the words tend to distract me, because they add little or nothing to the act. Also, I fail to see what is funny about farting. I mean, it was funny when I was nine years old, but not now. Even then, it was funny because it was a faux pas, not because it was particularly inherently funny. Then again, I’m a trumpet player. We use that sound to make sound. Serious business for us.
I don’t know if people laugh because of the shock of someone on stage, in the public, saying that. We all say those words in private (well, pretty much all). I mean, what if someone got up on stage, and stood staring at the audience for a while. The silence lengthens. Then they shout out “SHIT!” More silence. (Does the audience titter nervously?)
Then they shout, “SHIT!” [pause] ............... “FUCK!”
Between each utterance, is a silence. Maybe a waggle of the eyebrows, like Groucho Marx. The comedian is staring at the audience. Trying to get eye contact.
Each time, they add another one of George Carlin’s seven forbidden words. At the end, they change up the order. Make it into a chant. Urge the audience to join in, like a call and response thing.
Now that might be funny. With the right comedian. Good stage presence. Absolute confidence. A reputation. I dunno.