Why do teachers tend to punish boys more than girls for the same behaviour? Is it fair to the guys?
Why are you asking your Asian classmate to help you out with math homework?
This is what is called a double standard, which explained briefly means that to the same behaviour society reacts differently according to the "category" the person judged belongs to.
But of course, it's not just about genders, for instance, generally speaking, if someone white commits a crime or is involved in a shooting, he is probably just mad. However if the same guy is black or muslim, oh boy isn't he a confirmed terrorist? In many countries *coughs* the United States *coughs* this form of racism is still well rooted and leads often to violence and biased trials.
I am giving you all homework, as it doesn't simply apply to people on the news but in most of our lives, notice when it happens to you and try to underline it. You will find out that it happens a lot more than what you may think.