Men and women are from different planets.

Firstly, we should say some words about our traditions. Last century men should have been the  head of the family and women should have supported them.
Furthermore, man and woman had different responsibilities. Man worked and brought money, while his wife looked after children, did the washing-up and supported her husband. So, traditionally women and men are born for different roles in social life.
Secondly, interests are often different. For example, the most part of girls is interested in dancing, drama or singing, while boys wants to learn how to fight and they are interested in playing computer games.
Finally, there are a lot of differences between men and women in their behavior. But we'd better concern about such features between girls and boys, because they don't conceal their emotions and feelings.
Girls usually  are more emotional, than boys. They can cry because of sad scene in a film or a book.They also can be worried about unimportant problems like broken nails. But she shouldn't shout on somebody or fight with someone, because one girl looked at her boyfriend. Girls and women don't have to be strong.
Otherwise, boys and men are not very emotional and they should protect women and help them.
To sum up, people are different and it depends on their sex. Women and men  have had different responsibilities for a long time. By the way, there are a lot of jokes about "women's logic" and "men logic" and i think everybody understands such differences.