bigenderism

The theory that society enforces a strict male-female gender binary, privileges masculinity and maleness over femininity and femaleness, and (when the theory is strictly construed) limits gender to a direct correspondence with assigned sex

Understanding bigenderism may offer insight into the specific challenges faced by nonbinary people.

Bigenderism is a plague that specifically punishes gender-diverse people, but its negative effects go way beyond that. Bigenderism is a cross many children have to bear, and many don’t bear it easily. Living up to the expectations of bigenderist ideals requires a great deal of effort on the parts of young people who quake at the idea of being labeled sissy if a boy or being ostracized if a girl.

The state of being bigender; the state of having two (or multiple) genders simultaneously.

I find that bigenderism best describes my gender identity and pansexuality is a good descriptor for my sexual orientation.

To our knowledge, however, no scientific literature has attempted to explain or even describe bigenderism [...] This may be due to the low prevalence of bigenderism and relatively recent adoption of the term by bigender individuals.