What kind of bear?

A little polar bear goes to see his father one day and says "Dad what kind of bears are we?"
"Polar bears" comes the reply "your mum is a polar bear, I'm a polar bear and you're a polar bear".
Unhappy the little bear goes to see his grandfather and asks "Grandad what kind of bears are we?"
"Polar bears" comes the reply "your grandmother is a polar bear, I'm a polar bear and you're parents are polar bears so you're a polar bear".
Still not happy the little bear goes back to his dad and asks "Dad are you sure we're polar bears?"
"Yes, why?"
"Because I'm freezing!"
"Polar bears" comes the reply "your mum is a polar bear, I'm a polar bear and you're a polar bear".
Unhappy the little bear goes to see his grandfather and asks "Grandad what kind of bears are we?"
"Polar bears" comes the reply "your grandmother is a polar bear, I'm a polar bear and you're parents are polar bears so you're a polar bear".
Still not happy the little bear goes back to his dad and asks "Dad are you sure we're polar bears?"
"Yes, why?"
"Because I'm freezing!"