I was raised by parents who didn't believe in saying dirty-words. I think I heard my dad say "damn" once or twice in my entire life, but he usually emphasized his point with "shoot," "Dang-it," or "Darn-it!" When he was mad, he was "ticked" or "chapped" and when he hammered his thumb with one of his tools (which was often) he would shout, "son-of-a-biscuit-eater!" We didn't use Jesus or God's name in vain, we said "jeez" and "gosh." And if we had 'acceptable' family cuss words they were, "crap" and "ca-ca." In fact, I hadn't realized potty-talk was so controversial until I was an adult and one of the parents of a child I was sitting requested I not use it in front of their kid (never-mind that she and her husband practiced prolific profanity on a daily basis).
I suppose curse words are culturally and morally relative and vary in potency from person to person. For instance, I was never allowed to say the alternate word for urine. And as much as I hear my Christian friends use the "p" word in their daily vocabulary, I still cant bring myself to say it. I was taught that it takes more intellect to be creative and not use profanity, that even mentally-challenged people know how to cuss. But since I've grown-up, I've realized some situations necessitate the power that swear-words evoke--when used sparingly and in the right context, of course. I think my parents understood this need as well and perhaps that is why they allowed us to use curse-word euphemisms.