I must say one rarely hears "c**t" among the most profane discussions here in the US. "F***" of course is an all-purpose word: noun, verb, adjective, adverb. The most advanced users are able to employ the word in splitting a larger word such as "Fan- f***-ing- tastic!"
Perhaps the the incident involving the "C" word that sticks the most in my memory involved my wife. Now I should note that while she has been known to swear on occasion... she only does so with reason. She is not likely to employ a "Sh**" or "F***" unless she has been ticked off or angered to a good extent. The incident that I remember occurred in one of those large chain book stores. We were sitting in the cafe where endless teenagers gather... laugh... gossip... play video games on their i-phones or listen to their i-pods while waiting for a movie at the theater next door. Numerous young, urban, professionals are clicking away on their lap-tops, and the cappuccino and espresso machines churn out a consistent noise. I had left her to go check out a stack of art magazines. While I was gone, her daughter, who lives just outside New York called. As she was talking to her daughter, some snooty, rich old bat strutted up to her and loudly complained about how rude it was to be talking on the phone in a book store. When I returned she was sitting silently... clearly fuming about something. Finally she told me what had happened and pointed out the woman who was still sitting nearby. I told her to forget about it, but she continued to fume. Suddenly she burst out... "Get me out of here! If you don't get me out of here right now I'm gonna go over there and cuss out that old c**t licker in front of everyone." I laughed nervously... but she continued, "I'm not kidding, if you don't get me away from that c*** l***** right now it's gonna get ugly." I rushed and checked out the one art magazine I wanted and out we went. All the way home she kept bursting forth, "God d*** c*** l*****!"
Every now and then I'll mention the incident, and immediately the same words burst forth from her mouth... which I have never heard from her on any other occasion.
In reality, my wife is small (5-foot even) and slow to anger... but once she gets fired up, she's difficult to cool off... and the one area that she is most easily angered concerns her family. The poor woman in the book store had no idea what she was getting into when she interrupted a conversation between my wife and her daughter whom she sees but twice a year.