Are profanities meant to hurt or just a sick sense of humour?

Hmmm.... Just by looking at the title you should know what my post will be talking about. But i'm really puzzled. Are profanities meant to hurt or just a sick sense of humour? Because I have a friend who thinks that profanities are invented for a kind of humour only he can appreciate. When he says them he just smiles and doesn't seem to be angry. But I thought that profanities were to be used to express your utmost anger? Hmmm... I think that my friend could have changed his humour to be a warped sense. But you never know. Somebody may share his warped sense of humour! Share your comments on this article.