Let me think...

Or not. I just learned that your brain stores cuss words in a brain compartment separate from all other words. Moreover, this compartment never erases itself -- or forgets. Swearing almost becomes an autonomic response, more than it is a conscious choice. Certainly it makes it harder to overcome, and more likely to reappear. Interesting, eh?

Of course I have opinions about what this means for people, but I'll keep those to myself.