I am incurably scatological, learned it from my Mom. I do know how to pick my audience, something my brother never learned.
My grandfather was determined that his family would be raised strictly "American," so my mom said the only time they ever heard Swedish spoken at home was during Christmas and birthday planning, and when her dad hit his thumb with the hammer.Mom swore, Dad didn't. I don't think any of us girls (a definitely large, female family) really swear very much. But then, I'll go to read to my shut-in-friends, and say something and their very born-again-Christian care-givers will on occasion give me grief. Well, half of that is the books I'm reading, which I will not censor (one complained about Of Mice and Men. Luckily my gals set them straight on the censorship issue. But I do have a tendency to say something like, "Oh, God!" once in awhile. I explained, and it is true .... I really do mean, please, give me strength. It's closer to praying than it is to swearing! Someone up there, please, I need some help here.
I've been told that you swear and pray in your birth tongue. Daddy always prayed (probably still does) in French. I think swearing probably wasn't allowed in his childhood, and he just never really got in the habit of it. I spent my late teens/early 20s in the service, but never really got the hang of the "F" word. I think the next time I'm mad at someone, just to surprise them, I'll say, "Oh, intercourse you!"