Gender Is Not a Social Construct.

Gender and Sex are different terms for the same thing.  

Gender as its defined in the dictionary, is," either of the two sexes (male and female), especially when considered with reference to social and cultural differences rather than biological ones. The term is also used more broadly to denote a range of identities that do not correspond to established ideas of male and female." 

Sex as its defined in the dictionary is," either of the two main categories (male and female) into which humans and most other living things are divided on the basis of their reproductive functions."

So basically, gender is the naming of the two sexes. 

Gender is not a social construct.

It is used in more than just humans, animals use gender as well.

They both have distinct genders and sexes, that define them. Animals can't Identify as the opposite sex or gender, so gender can be used as a scientific term to name the two sexes. 

Lions, as the only social cats, live in groups called prides. Prides consist of between three and 40 lions, with 15 being the average. Females commonly remain with their birth pride for life, but males leave after two to four years. There are generally only one or two adult male lions in each pride.

Males are primarily responsible for the security of their pride. While they will participate in hunting, they spend the majority of their time on security patrols. They will defend their pride’s territory, which can cover up to 100 square miles. Females are primarily responsible for hunting, which typically occurs after dark. They are also the primary caregivers for lion cubs. The eating hierarchy is males first, followed by females and then cubs.

Unlike females, male lions leave their birth prides at between two to four years of age. They initially form groups or coalitions with other young males from their pride. During this period, the males roam and progress toward full maturity. Upon reaching maturity, they seek to establish their own prides by taking over other prides. If they are successful in ousting a pride’s males, they quickly kill all the pride’s cubs. This is done so that they can then mate and sire their own cubs. The killing is necessary because females will not mate again until their cubs reach around two years of age, and the male lion will usually remain with the pride for only two to three years before being run off himself by new male challengers.

Genderqueer: Genderqueer people typically reject notions of static categories of gender and embrace a fluidity of gender identity and often, though not always, sexual orientation. People who identify as "genderqueer" may see themselves as being both male and female, neither male nor female or as falling completely outside these categories.
 
Non-Binary (NB or enby): Anything that falls outside of the binary system (see definition above). Intersex, genderqueer, and bisexuality are all examples of non-binary identities.
 
Adapted from http://www.hrc.org/resources/glossary-of-terms and https://www.thetrevorproject.org/trvr_support_center/glossary/

"Some people have a gender which is neither male nor female and may identify as both male and female at one time, as different genders at different times, as no gender at all, or dispute the very idea of only two genders. The umbrella terms for such genders are 'genderqueer' or 'non-binary' genders. Such gender identities outside of the binary of female and male are increasingly being recognized in legal, medical and psychological systems and diagnostic classifications in line with the emerging presence and advocacy of these groups of people. Population-based studies show a small percentage – but a sizable proportion in terms of raw numbers – of people who identify as non-binary."
From International Review of Psychiatry. Feb2016, Vol. 28 Issue 1, p95-102. 8p.

• Non-binary gender (Wikipedia)
  
• What does it mean to be demigender?
  

  Have you ever felt like you could identify with certain aspects of one gender but don’t connect to it fully? Do you feel as if you only partially identify with your gender? If you answered yes to these questions, you just might be demigender.
  

What’s the Difference Between Sex and Gender?
People often use “sex” and “gender” interchangeably, but they are two different things. Sex is a biological term based on body parts, chromosomes, and hormones. Sex is not as binary as many think it is. There are some people (known as intersex) whose sex is not strictly male or female, but instead falls on a spectrum between these. Gender, in comparison to sex, refers to our internal sense and understanding of ourselves relative to the social and cultural associations and roles that we grow up with.

Gender Identity is a Spectrum
As we grow up and get to know ourselves, each of us tends to develop a personal sense and experience of our gender identity. Some of us fall into a binary gender category (male or female), while others of us are somewhere in between (nonbinary) or don’t feel connected to either gender (agender). Those whose gender identities match their sex assigned at birth are referred to as cisgender, while those whose identities do not match their sex assigned at birth may identity as transgender.

Expressing Gender Identity

While gender identity is our internal concept of our own gender, gender expression is how we present our gender identity through our appearance—including how we act or talk, what we wear, and how we style our hair or makeup. How we express our gender may or may not conform to what our families, friends, or society associate with our sex or gender identity.

What’s In a Name?

Our names are part of our identities. For some people, the name they were given at birth—like the sex they were assigned at birth—doesn’t match their gender identity. Sometimes when someone comes out as transgender or nonbinary, they also ask to be called by a new name, one more in keeping with their personal sense of identity.  For some, choosing to change their name can be an affirming act. It can also alleviate discomfort that may be associated with their old name.

The name that the person used before they came out or transitioned is commonly referred to as their deadname. It’s respectful to avoid using someone’s deadname unless they proactively say we can.

Gender Pronouns

Another common way of expressing our gender identity is through the pronouns we choose to use. Pronouns are the words that a person uses for themselves, and would like others to use, when referring to them not by their name. Some examples of pronouns include:

• She/her/hers
  
• He/him/his
  
• They/them/theirs
  
• Xe/xem/xeirs
  

Some people might let you know that they use more than one pronoun (for example “she/they”) which means they are comfortable with either pronoun set.

It’s important to be respectful when someone tells you their gender identity, name, and pronouns. When in doubt, ask “what pronouns do you use?” or “what name should I use?” Asking these questions respectfully is better than misgendering someone—referring to them in a way that doesn’t reflect their gender identity—or using their deadname. If you hear someone else misgendering or deadnaming a trans or nonbinary person, speak up if you feel safe doing so.

In group settings where you feel safe doing so, you can introduce yourself using your preferred name and pronouns. For example, “Hi, my name is [your name] and my pronouns are [your pronouns.]” This can help encourage others to do the same.

 as we evolved gender to be complex over time.

Woman is an adult female human, girl is a younger one

Gentleman vs fuckboy/manwhore vs bad-boy vs prince. Lady vs slut/whore vs bad-bitch vs princess