Eating cultures

I think there are some different points between Japan and America. One of the differences between us is that Japanese usually use chopsticks, but Americans do not. Actually, we often use fork and spoon, but we use chopsticks all most all the time. By the way, if we, Japanese, cannot use them well, it sometimes makes people uncomfortable. This is because we think it is assumed that we can use chopsticks perfectly. Second point is we usually have soup while making sounds and it is polite, but Americans think it is rude. This is because Japanese believe that the sound makes people, perhaps the host, happy. We express our satisfaction with sound. On the other hand, Americans have soup without sound. Sometimes, I forget the American style, so I have to study American eating culture more.