[chryuop]

I think it is more the use you make, more than number of words...even though in my language I could easily fill a book with them LOL.
For example. I guess you all know the city of Venice. In that area it is very normal for people to cuss the name of God every other phrase.
In my town Milan, it is very common to use the English "C" word to refer to a pretty girl and in Italian language there is a word very commonly used (I used to use it in front of my parents too) which is without "C" word to mean to be unlucky.

As I said, we all have bad words, but we have to see how they get integrated into everyday's life.