There are a lot of misconceptions about what being trans is like, about how it feels, why people are transgender, and so many other things! I'm sharing a number of things that some trans people wish others would understand.
A person successfully and convincingly presenting themselves as a cisgender member of a gender they were not assigned at birth is called "passing". Passing is a complicated and controversial topic, partly because of the issues that it raises for both those who can and cannot pass. It's also a philosophical issue, a safety issue, and a social issue (and a variety of other categories).