A guy walks up to a gal in a bar and takes a seat. As he turns to her he asks:

"Excuse me miss, but, you wouldn't know how much a polar bear weighs would you"?

The gal, looks at him strangely, not at all expecting this question and reply's:

"No, I don't I'm sorry".

He immediately smiles and reply's::

"Enough to break the ice, My name is..."