"cunt" is not a word I use often, it's pretty moronic and more vulgar than I intend, I find calling people I find less than appealing "nob jockeys" or "chutney ferrets" or "wank-stains" more amusing, basically making up my own insults amuses me, "cunt" is just admitting that you don't really have the ability to say anything remotely clever, but you REALLY want to swear.
however, used correctly, cunt can be a very amusing word, like one time, my dad said it, I laughed for ages...
"KAJUN!! I'M BURNING, YOU FUCKING CUNT!!!"
ha ha ha, it still cracks me up
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Dad was flammable