Two Polar bears are crouched down on an ice flow, the young Polar Bear whispers to old Polar bear.....
"Dad, are there any koala bears in our family?"
"No son, you are 100% polar bear, now stop bothering me and help me catch that seal"
"Dad, are there any brown bears in our family?"
"Look lad, I've told you, I'm 100% Polar Bear and so are you, now get ready to catch that seal"
"Dad, are there any grizzly bears in our family?"
"For f*cks sake, you've scared him off, what's the matter with you?"
"I'm f*ckin' freezing"