Males and females do have differences. Their brains differ in size and in basic functioning. The male is controlled by what is called a "hunter's instinct", and the female is controlled by what is called a "nurturer's instinct". Thought processes also differ between the sexes. Males deal more with facts, problems, and solutions which he generally handles on his own. Females deal more with emotions and dealing with problems by talking about them with someone else.
There are also the obvious physical differences. Males have more muscle mass and females tend to have more fat stores. Males are as a generally physically stronger than females.