How might this be challenging for society, both those who do not fit the gender binary and those who do?

What are some examples of how society assumes everyone is part of the gender binary (male or female)? How might this be challenging for society, both those who do not fit the gender binary and those who do?

or

There are several theories which are used to explain human sexual orientation. Discuss why you think any of these theories are important, how you see the theories working together to explain human sexual orientation, and what roles you think psychologists can play in using these theories to explain human sexual orientation.

Write an essay of 200-400 words addressing ONE of these questions.