"Why, then, 'tis none to you: for there is nothing either good or badbut thinking makes it so: to me it is a prison."
Of course, Hamlet was talking about Denmark, but he could have as easily been talking about words. I recall very few scenes in movies where cussin' has been effective. But every now and then, ya know?
"Braveheart" (I know, I know) had a scene in which the Irishman yelled, "Fock you." I though that was great. More I think for the way it was said than the word itself. Another was a scene in "Die Hard with a Vengance" where the lady softly mouths the word "Asshole" about a superior officer. Some times are more appropriate than others I suppose.
I learned that not ALL times are appropriate in Dunn's Restaurant in Montreal. I was 18 and I took my grandmother out to dine. I was full of piss and vinegar, and I dropped the BIG word at the table. My grandmother--all five foot, 95 pounds of her--reached across the table and gave me a little reminder across the face. I went backwards off the chair, thus receiving glares from other diners. I got up, apologized, and sat back down. I have always remembered that. To this day, Mary Walsh owns a piece of my heart, and any time I am tempted to use the eff word, a thoght of her flashes across my mind as I consider whether it would be worth the pain.