Holy shit this is the first time I've ever heard anyone do the same thing as me. My kids have "home words." We've tried to explain that some people think those words are bad, but we think the idea of bad words is silly and really it's all about what you're saying. Similarly to you, my kids will curse every once in a while (and sometimes I have to try really hard not to laugh) but not nearly as much as I did when I was a kid (though never around in my parents, in my case).