Even if a non-binary person is openly trans, revealing what that non-binary person’s ‘gender assigned at birth’ was without their consent is a huge privacy violation.
When you do this you are allowing transphobes to more effectively misgender them. You are often revealing details about their genitals and hormone/surgery choices. You are taking away their chance to be seen for who they are on their own terms.
Don’t do that.ever.
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