Great Psych Language Moment

Television scripts (even more than movie scripts) are written by people who love language. And they are constantly commenting on it.

In the episode "Bounty Hunters!" (with the exclamation point) from Psych, Sean and Gus get into a discussion on what to call the thing- that-people-carry-that-usually-contains-business-papers.

Satchel?
Bag?
Attache?
Briefcase?

It's not just about denotation--the actual definition. It's about connotation--the word's associations. Does "attache" sound more refined than "bag"? What comes to mind when a person hears "satchel"? What about "briefcase"? Or is that just too generic and uninspired?

It's a very cute moment. And instructive!