I've talked about how it's an exaggeration how much the c-word is used in Australia (and that it's used more as a specific class/race/male signifier).

But it does sound extremely funny to hear North Americans use it for the actual private part. I remember seeing some serious movie where an actress says something like "stick it in my c-word". And it's meant to be both sexy and to show how vulgar she is. And I just lost it laughing.