Duogamous

Duogamy refers to a multisexual (most commonly bisexual) individual who has two exclusive partners, both of which have dissimilar genders, most commonly one of each (binary) gender. It's when an individual has a relationship with two people, both of which have opposing genders.

History
The word duogamous is mentioned in the Bisexual Manifesto in 1990. Because of identity elitism, bisexuality is commonly erased by biphobes for not practicing duogamy, as if they were not truly bisexuals.

Flag
The flag was coined by Tumblr user beyond-mogai-pride-flags on September 3rd, 2019. It has no confirmed meaning.