[masraum]

You don't have to eat the stuff in other cultures that you don't want to eat, but if offered, you have two ways to decline (good way and a bad way). You can come up with a polite excuse or you can make a face of disgust and say "no way in hell am I eating that crap". Sadly, there are some folks who would not think twice about being rude about it.

If showing the bottom of your foot is considered rude, then I would not show the bottom of my foot (I believe this is mostly a Muslim thing, isn't it?). There are rude folks from all over the world, that doesn't mean I should be too.