Romano managed to beat America in a belching contest (Romano found the whole affair disgusting, and voiced it many times, but was very happy when he won).

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Romano managed to beat America in a belching contest (Romano found the whole affair disgusting, and voiced it many times, but was very happy when he won).
America's ringtone for Romano is Sway by Dean Martin.
((Link to Sway: www.youtube.com/watch?v=zsgcXZzu6io ))
America has made it his goal to take Romano to every single theatre in the US. They have been to about half so far.
Romano secretly supports Daenerys Targeryn after America showed him Game of Thrones on date night.
America loves making puns- Romano smacks him for the really bad ones. Then Romano will tell him really cheesy pick-up lines later.
It's an on-going battle.
America enjoys couple cosplaying with Romano (like at cons or whatever). And Romano will never admit it, but he secretly enjoys it, too.
One of Romano's favourite things is watching America defend people. This has happened multiple times when they were just hanging out in their countries. If someone is being rude or whatever, America will automatically defend the victim. And every time, Romano finds himself falling deeper and deeper in love with him.
America doesn't deal well with season finales. Romano always stocks up on America's favourite things to help cope, and then distracts him from his pain in every. single. way.