Prolapsed Disk Exercises

recently participating in a talk show jokes, basically we sat down to make jokes for a few hours, joke after joke. Perhaps it is something that should be repeated more often, but many of the jokes and had heard, this one looks more graceful than others Sometimes, maybe it was a product of context.
Here I leave with one of the star of the night jokes:

He asks a polar bear to his brother,
"Brother, I'm a polar bear?
"Well, you're white and live in the North Pole, so if you are a polar bear.
Then he turns to his mother:
-Mama, I'm a polar bear?
-son, of course, you are my son and I am a polar bear.
finally goes to his father:
"Dad, I'm a polar bear?
"Sure, if you are white and hairy, live at the North Pole and you're my son, of course you're a polar bear, but why do you ask?

"Because I have a cold diaaaaaablo der!