Were you annoyed as a kid, when your parents told you to clean your room, sent you to bed early and scolded you for cursing? There might be a reason for your behavior. Studies suggest, that it can be linked to an increase of your IQ. Intelligent people use more curse words. You always hear, that people who swear have a “limited vocabulary”. But if you think about it, those who don't use any swear words are the ones who limit their own vocabulary, because they intentionally use fewer words than others. Interesting.