Mexican Eskimos

"The North Pole is covered in snow! Polar bears live there! The North Pole is really cold! It's so cold, only Mexicans can live there."
Er, what? Mum and I looked at each other. "What do you mean? Who lives there?"
"Only Mexicans! Because it's so cold!"
"Really?"
"Yes! They live in igloos made from the snow! And they wear big fur coats!"
Oh right. Eskimos.