So you know how no one knows why Turkey has a mask on? Not even Hima knows. So this is my theory
What if when turkey was still younger, he got something tattood or like imprinted across his face? But it was something stupid like a dick or something? And he knew no one would take the might Ottoman Empire seriously if he had a fucking dick drawing on his face. So he wears a mask and shit. The tattoo finally fades away but he likes the mask so he keeps it on.