I've always wondered why so many people can't get American's sense of humour, maybe as a matter of cultural boundaries we can't help not accepting a different sense of humor. It reminds me of my aunt, who doesn't understand English, telling me she didn't get the jokes while watching an American comedian on TV. I only told her that their humour was different than ours. I got the jokes and I thought they were good. I didn't point out the fact that subtitles always have problems with meaning, many with huge inaccuracy, sometimes intentional. It seems in order to get another country's humour, people should learn the language.

I think it has a lot to do with culture and openness, even Americans and the English have different concepts of what's funny. In my opinion, it depends more on how open people are to other cultures and perspectives.