In North America
a cunt is presumed to be a vagina and pudenda of a low order. It is only used as an insult by incoherent rummies.
There are plenty of alternate anatomical insults of course.
The use of fuck as an all purpose modifier in Canada is traced to contact with Australian soldiers during WW1. Australians evidently got it from the Irish.
(the other guy not the one that gave you coochie warts, Thu 12 Dec 2013, 14:53, 1 reply)

I thought Fuck came from German?

By happy coincidence, only this morning, a workmate opined that Fuck was clearly one of my favourite words, as I pronounce it on a regular basis.
( Ken Oath, Thu 12 Dec 2013, 15:01, closed)

I think what he means by "all purpose modifier" is the uses of 'fuck' like "that fucking botty-biscuit" where the person isn't actually fucking anything, it's just adding emotional force to the utterance. Words like this are sometimes called 'intensifiers'.

There's some linguistic literature on this type of thing, and also some interesting stuff to do with FCC guidelines in America.

I thought that 'fucking' as an intensifier was a lot older, but it does look like it's pretty recent- I'd like to know more.. In fact, searching for those kinds of uses from the 1800s mostly turns up horrible OCR errors on google: link
( the prick of misery pierced my foot on a spiiiike on, Thu 12 Dec 2013, 15:31, closed)