A baby polar bear went to his father and said, "Dad, am I really a polar bear?".

His father replied, "Of course you are! I am a polar bear, my father was a polar bear and his father was a polar bear!"

The cub then asked his mother, "Mum, am I really a polar bear?".

His mother said, "Yes dear, you are a polar bear. My mother was a polar bear, her mum was a polar bear, and so was her mother! Why do you ask, son?"

The young one replied, "Because I am freezing!".