The son looks at the father and says, " Dad I got a question, are you sure I am 100% Polar bear?".
The father looks at his son and says, "Yes son you're 100% Polar bear"
"OK" the son says.
They keep walking and about 20 min' later the son again says: "Are you sure I am 100% Polar bear?"
The father again says, "Yes son you're 100% Polar bear"
"OK" the son says.
Then about 30 min' later the son says, "OK dad be serious are you sure I am 100% Polar bear are You sure there is no black bear or grizzly bar in me??"
"Yes son you're 100% Polar bear, I am 100% Polar bear and so is your mother. Why do you keep asking son?"
The son says,
Spoiler:
freezing"
