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!"