In truth, I can't imagine anyone IRL calling anyone a cunt.
It was always one of the out of bounds words, we never used words such as bitch, cunt, a-h or even the f-word, with children it would have been tantamount to child abuse and neglect to use language like that around them.
The kids to this day don't use curse words or demeaning language.
It's just not done IRL I don't think.

On the other hand, I do. My husband won't tolerate it but I still let plenty of that stuff slip out now. I'm more liberated I guess.

McCain's filthy mouth is just a footnote to his overall personality.