Blogger Emma Nicholson of "Hot Flashes of Inspiration" wrote a blog for Huffington Post about teaching her son Ben to curse. This may sound odd but Nicholson defends her parenting choice by explaining that she wants Ben to have the social skills to handle every life situation like adult conversations that involve cursing.
As a child, Ben would mostly repeat words and phrases he heard on TV or from others around him. Then one day he got in trouble at school. Some kids in his class tricked him into saying a certain word that he did not know was a curse word. That's when Nicholson had the realization to teach Ben every single curse word and their meanings.
Read Nicholson's full blog post here.