I wouldn't have expected there to much conversation of any kind in a porn film ;-)
The list might have to be a bit shorter.
Probably. I remember, many years ago, a friend of mine translating a book about the female sex into German, and her biggest problem was the blurb: On the English version, the entire back cover of the book consisted of expressions, slang and otherwise, for "vagina", and the German publisher wanted to do the same. She just couldn't find enough words. In the end, she threw in some obscure dialect words she found on the net to fill the page, but even than it was a shorter list.
I guess it makes sense that a group as big and diverse as that of English speakers develops more colloquialisms and slang expressions.
Edit: There goes my theory.... But I still think it might apply in some areas.