Did your parents allow you to cuss?
My mom was very strict about cursing, even though she used curse words herself. She would give me an astonished look if I said one around her, even when I was a young adult. I think it is funny in retrospect but I do respect her teaching me how to curb my enthusiasm for certain four letter words. It's helped me as an adult I think, while I can curse with the best of them I have no problem curtailing my language during times when I need to.
But who knows if that really helped me, I just like to think it did.
On the flip side, lots of my friends have teens who cuss openly and freely. I have to admit a small part of me can't help but be astonished. I expect a slip up because lord knows they are cursing like sailors when out of earshot. But I guess the way I was raised makes me a bit of a prude, damnit. ;)
I don't get upset over a slip, it happens. But I'm not okay with every other word being an "F" bomb, and that's typical for a teen.