Actually, I don't.
I've never said a swear-word in my life. Can you believe it?
I was really frustrated the other night and said something to a friend about how a swear-word was going to creep out one of these days if I keep getting so frustrated and that I've never sworn, so that is a big deal.
She looked at me and said, "Me neither!"
I've never met another non-swearer - it was almost like meeting a unicorn - they exist! I am not alone in the world:-)