Just read an article about a woman on social media saying that she lets her children swear. According to her, "They know when they can swear, how they can swear and who they can swear around" and now it's got me interested in how many other parents share this view.
Personally, I know my kids may swear outside the house with their friends, but they know they are not allowed to swear at home and when talking to me and DH. I have also never dared to swear in front of my parents. I think I see it as a respect thing.