In every words we say we must be careful of it because there are instances that we had already hurt the certain person without knowing of what we are saying that would make them hurt .

Some of those people we know have different attitude, maybe that person don't want your joke, but in your part it is just nothing but from others it is a big deal for them.

So to be able to see to it that were not hurting that person we must be careful of what we will be saying and speak without offending others.