Gender, Sex, and Gender Expression: What's the difference?

Hi everyone! This post is about the differences between gender, gender expression, and sex. Firstly, we do NOT mean sex as in intercourse; the definition will be below. Also, it is very possible that you will feel that this post is untrue for many reasons. If so, please do NOT leave rude comments or messages. You may present your case in a polite way and we will consider your grievance, but irrelevant or inappropriate messages will be disregarded and deleted. 

I'll start by writing a rather controversial statement: There are many genders. 
If this makes you angry or annoyed, then by all means, stop reading immediately. If not, please proceed.

Gender is one's identity. It is a part of who you are, and it can be influenced by many things such as one's chromosomes or hormones. Contrary to popular belief, people CANNOT change their gender. Don't get me wrong; your perception of yourself and your identity can evolve over time. But its not a conscious process that you can control whenever you want.You are who you are and that's all there is to it. This post won't contain a list of genders; that's long enough to warrant its own post. Some examples of genders, however, include pangender(identifying as all or many genders) and demifemale(identifying as partially agender and partially female). Again, many of the prefixes used to describe sexualities and romantic orientations also carry over to genders. For example, one can take the prefix "a-," which means "no" or "without" and stick it onto any of the root words to create "agender(no gender)," "asexual(not sexually attracted to anyone)," and "aromantic(not romantically attracted to anyone)." 

Gender expression is how one shows their identity. One can identify as any given gender and still express themselves in a way that is contrary to social stereotypes of their gender. For example, a guy can wear makeup and skirts. It's no big deal. There are three main types of gender expression: feminine, masculine, and androgynous(gender-neutral). Feel free to point out if I have missed any, but those are the three that I know.

Sex is defined by someone's physical characteristics. These may include genitals, inner reproductive organs, chromosomes, and hormones. A person's sex is usually what their doctor bases their "birth gender" on; someone with a vulva is a girl and someone with a penis is a boy. This is not always true. There is also a sex called intersex. An intersex person has a combination of male and female genitals, inner reproductive organs, chromosomes, and hormones. There are many different combinations of the above, and therefore every intersex person is unique in terms of their particular combination. Some doctors prefer to remove different parts of the inner or outer reproductive organs if a baby that they birth is intersex. This has to do with the doctors not understanding that being intersex is perfectly normal and healthy, and therefore being afraid of what they do not understand. 

So, if you have any questions, please post them in the comments.
Love y'all!
-Heather