Fuck is my favourite word, cunt is my second favourite word. I do not use either in front of my DD.
What other words are there when you are just right over the edge??? You can get right behind them FFFuuuck and CCCCCunt Fudge and cupcakes just dont cut the mustard.
I probably use fuck too much in general, but cunt is reserved for special occasions.
I call my vagina my pussy generally, but if i am being sexual i call it my cunt, i find it erotic and so does my DP. I also tell my DP to FUCK me harder. They are just very experssive words.
Its all a matter of context i guess.