I think you already kinda answered your doubt. It's how my creativity works, sort of, and it's a brazilian thing, too. You know when you read people calling Ronaldo (the soccer player), "Ronaldinho"... or that tennis player we have (former # 1), Gustavo Kuerten, "Guga"...? It kinda works that way. Plus Matiass is from Argentine, and God knows how brazilians like them,
