"When you write humor, it’s not funny to you. It’s not even really that funny when you first think of the idea. There may be a glimmer of humor because it still seems vaguely original, but after a couple of days it’s not funny at all. You’re just trusting that it was, at some point, funny, and that your honing and tweaking is really improving it. I would eventually reach a point where I would just think, This feels old, even though nobody’s seen it but me."
from And Here's The Kicker