Have you been to Asia? In Bali, off the beaten path, motherfuckers study and approach you as if you grew horns on your head. Get over it, man. You re different. Id stare at you, too. Whos the other brother and whatnot. Argentinians are weirdos, I give you that.
I first went to Asia 15 years ago man. I'm a serious traveller. I've probably been to more countries than you could name before going to Google for help. I walked the streets in Thailand and people barely paid attention. Being different is not a license to stare uncontrollably and I've been to places where I was the only foreigner and only black person and people rarely gave a double-take. Staring is only one aspect. I'm not about to write a book on it but that was an example to give people a quick view.
Argentinians aren't "weird". They have a euro-centric anti-black complex that permeates their entire culture and it shows itself in different ways...the ridiculous staring is just one way they show it. I'm in a place right now with way less blacks than Argentina and people don't even act the way the Argentinians act. They're known for their arrogance.