"What is up with this title?"
"I think Tortilla Curtain is a play on The Iron Curtain."
"Ah, see. Now that's why I married you. I missed that. You so smart! Go on ..."
"Well, since The Iron Curtain was the physical and symbolic boundary between the Warsaw Pact countries and the NATO countries after WWII until the end of the Cold War ..."
"The Tortilla Curtain would be--
"I'm guessing it would be symbolic of the ideological separation between the U.S. and Mexico ..."
"Like an Iron Curtain."
"And, let's not forget, tastier."