It seems they've removed the Penn and Teller eps from google video, but anyways... the point of words is to express a meaning. I was thinking about it today aswell: why are swear words bad? Simply because we focus on them as bad. What makes 'darn' any less worse than 'damn'? That makes 'shit' anymore harmful than 'poop'? It's simply the emphasis society has placed upon these words. If there was no such idea as "swearing" then these words would be just as common and unharmful as saying "dang", "shoot", "curses", etc...