In response to: http://www.reddit.com/r/pics/comments/o2d4n/by_far_my_parents_best_vinyl_records_fixed/ Actual content link: http://i.imgur.com/pFJ2O.jpg
We laugh at things when they suddenly make sense. We make sense of things by taking in as much information as we can, and trying to recognize patterns in it. Carlin just lived his whole life trying to experience new things, meet new people, and talk honestly with everyone. If you do that, your brain will physically build stronger connections between the patterns that make the most sense.
If you spent your life experiencing new things, meeting new people, and being completely honest, you'll find yourself being happy all the time, and knowing how to solve a lot of problems. Carlin knew how to solve problems so fast, he could tell you the solutions before you even figured out they're problems.
That's why you laugh, and that's how your brain physiologically learns better. A happy man learns more efficiently. So it follows that comedians learn the most efficiently. And their influx of new information is never quelled, because they go to a new audience every night. And every night someone will tell the comedian what they think is funny. It grows inside that comedian's mind.
Comedians don't make themselves, we make the comedians by telling them what we'll laugh at. We do that by laughing at the jokes we think are funny, until they recognize how to craft jokes everyone in the audience laughs at.