How do they know that swear words are wrong?

And if they have never heard it before, then like I said in my previous post, it becomes a fantastic teaching opportunity. Although how a young person could use a word he/she'd never heard before is way out of my comprehension.

The word is out there, in music, films and games, so there is a good chance of them hearing it. It's not a word that should be hidden away from society, but filled with context and discussed.