The Simson School

 I think we don't have to change the dress because of other people might think.  

 First, if we change the dress because of other people might think, we will buy only one dress because other people think that is good. So all people are wear same dress. But I think all people wear same dress is not good. 

 Second, fashion is change very fast. So if we change the dress because of other people might think, we have to buy a lot many new dress because of other people might think. But it need very much money.  

 So I think we don't have to change the dress because of other people might think.