In sociology, gender identity describes the gender that a person sees themselves as. Most people see themselves as a man or woman; a boy or girl. For almost everyone, the gender they identify as, matches what the doctor said they were when they were born. For a few people, however, they were called one thing when they were born, but they feel like the other gender; people in this group are called transgender. Sometimes, other people are called transgender, too, when they do not fit society's expectations about gender roles—that is, how a male or female of a certain age and culture should look and act. Simply refusing to conform to behavioral stereotypes is also called "gender non-conforming".