There are many reasons, of ...

There are many reasons, of course, why someone might snap their fingers and grin. If you heard some pleasing music, for instance, you might snap your fingers and grin to demonstrate that the music had charms that could soothe your savage breast. If you were employed as a spy, you might snap your fingers and grin in order to deliver a message in secret snapping-and-grinning code.
There are many reasons, of course, why someone might snap their fingers and grin. If you heard some pleasing music, for instance, you might snap your fingers and grin to demonstrate that the music had charms that could soothe your savage breast. If you were employed as a spy, you might snap your fingers and grin in order to deliver a message in secret snapping-and-grinning code.

Quotes from the same author

Perhaps if we saw what was ahead of us, and glimpsed the follies, and misfortunes that would befall us later on, we would all stay in our mother's wombs, and then there would be nobody in the world but a great number of very fat, very irritated women.
Announcing your death should be like announcing that you are a lunar moth: It must be done quietly or it will not be believed.
When somebody is a little bit wrong - say, when a waited puts nonfat milk in your espresso macchiato, instead of lowfat milk - it is often quite easy to explain to them how and why they are wrong. But if somebody is surprisingly wrong - say, when a waiter bites your nose instead of taking your order - you can often be so surprised that you are unable to say anything at all. Paralyzed by how wrong the waiter is, your moth would hang slightly open and your eyes would blink over and over, but you would be unable to say a word.
Everyone should be able to do one card trick, tell two jokes, and recite three poems, in case they are ever trapped in an elevator.
When trouble strikes, head to the library. You will either be able to solve the problem, or simply have something to read as the world crashes down around you.