People feel that way about me when they see me swear in real life. I never swore - ever. About 7 years ago, I worked in a boys home. The foster parent swore like a sailor (he died a few years back). Ever since then, it's been part of my vocabulary (in most circumstances, anyway). People who don't see me that much are still used to the guy that never swore.
That's my useless story that no one wanted to hear for today.