Nonbinary erasure

Nonbinary erasure, or non-binary erasure, refers to the erasure or refusal to acknowledge any genders that do not fit in the gender binary of man and woman. Erasure can take many forms. For instance, saying "he or she" instead of "they" implies that there are only two acceptable pronouns. Saying "ladies and gentlemen" implies there are only two genders. The erasure of non-binary genders is common in Western society.

Non-binary erasure and eurocentrism
Acknowledging only two genders is a Western concept, one that was exported to other nations through colonialism. Other cultures acknowledged more than two genders. For instance, India acknowledged Third Gender as a non-binary gender. In North America, certain native American tribes recognize two-spirit as a non-binary gender. It should be noted that while Third Gender and two-spirit are names for non-binary genders, non-binary people who do not herald from these cultures should not adopt these terms to describe themselves.