In the comic titled "while you were gone," it was revealed Liet has deep scars on his back, most likely from Russia, because Poland saw them after he had come back from Russia's. Look it up, it's one of the most sentimental LietPol comics ever~
...I personally like Liet's scars, they're a good story point and give him more character.
Lol the title made me think of that Charlie the Unicorn thing... "Ring ring!" "Hello?" "Ring ring" "H-Hello?" "Ring ring" And then I imagined Russia bursting into the room like, "YOU HAVE A BAD RECEPTION!" And I laughed my ass off. Still, amazing picture. The colors are so awesome!