Teaching your kids not to curse is just one of those things good parents are expected to do. Like teaching them not to punch other kids on the playground or steal a pack of gum from the store or lie about whether or not they did their homework. Naturally, teaching your kids not to curse includes not cursing in front of your kids. What with the example-setting and all. Except, here's the thing: Punching and stealing and lying are behaviors we consider "wrong" for valid reasons, most of them involving someone getting hurt on some level or another (sometimes, themselves). Why is swearing "wrong," exactly? Because it's "not nice," some would say. Or "because I said so" or "because some people might get offended." None of these reasons carry any real weight, in my opinion, and I personally refuse to waste time and effort instilling values in my kids that I don't even believe in.
So yes, I swear in front of my kids. And here are the reasons why.