Superstitions Homework

We talked about many superstitions in many countries, but do you think it is important to talk about them? Why?Is communication affected by superstitions?
Do you believe in Japanese superstitions?
If so, what superstitions, what do they mean and why do you do,use, or believe in them?

I think it is important to talk about superstitions because it strongly connects with our cultures, custom and taboo. We must know taboo in each countries and follow them when we visit there.
Then, communication is affected by superstitions, I think.
Some superstitions may hard to understand or accept but if we try to accept it, we can communicate more easily!
I guess old people tend to believe superstitions in Japan. Actually, my grandmother knows so many superstitions and she almost follows it! For example, when I try to cut my nails at night, she says "Don't do that! You can't be present at your parents's death!!" .
Of course, there is no evidence or reasons, so I don't believe in Japanese superstitions!
However, when I become sensitive about the topic, perhaps, I may follow the superstition.