In liberal countries, gender roles are still apparent in many regards - women often spend more time childrearing and men are more likely to be the primary money-earners.However, traditional gender roles are not set in stone and are increasingly reversed in modern societies.Historically, the terms "sex" and "gender" have been used interchangeably, but, in modern society, their meanings are becoming increasingly distinct.
For instance, high-heeled shoes, now almost unanimously considered feminine in Western societies, were initially designed for upper-class men to use when hunting on horseback.
The following quote comes from a trade publication called The generally accepted rule is pink for the boys and blue for the girls.
The reason is that pink, being a more decided and stronger color, is more suitable for the boy, while blue, which is more delicate and dainty, is prettier for the girl." Move forward 100 years and you would be hard-pressed to find a single male baby dressed in pink in the industrialized world.
For transgender people, their own internal gender identity does not match the sex they were assigned at birth.
Most people have a gender identity of man or woman (or boy or girl).
In some cases, a child is born with a mix between female and male genitalia; they are sometimes termed intersex, and the parents may decide which gender to assign to the child.