Humor is perhaps a sense of intellectual perspective: an awareness that some things are really important others not and that the two kinds are most oddly jumbled in everyday affairs.
The trouble with wedlock is that there's not enough wed and too much lock.
Humor results when society says you can't scratch certain things in public...
Anyone who writes knows that ultimately the majority of your time is spent alone in a room with a piano or a guitar no matter what the project is.