Well, he's 4 and, although he knows every bad word except "cunt," he knows better than to say them, at least in front of grown-ups. But cursing is not ruined for him - he still thinks cursing is hilarious and he frequently asks me to say a bad word.

I would say it's working out. He doesn't offend the tribal elders and I don't have to lie by simulating outrage - I've told him the real reason why he can't curse.