How to gas your vehicle with out the awkwardness

I'm sure if you own a vehicle you have had the argument of "what side the gas tank is on". I've experienced this a bundle of times. "Sweetheart its on my side" turns into... WHY DID YOU TELL ME THE WRONG SIDE IF YOU DIDN'T KNOW?! I used to do this all the time. Even if I got it right, I still hesitated before pulling up. UNTIL... One of my friends showed me a obvious inside indicator of what side the tank is actually on.

 Now .. Would you look at that, an arrow that points to what side the fuel up tank is actually on. A simple trick that saves you time and unnecessary arguments at each fuel up. Did you notice it was in your vehicle? Because I didn't.       

Enjoy the tip,