Duogamous

Duogamy refers to a multisexual (most commonly bisexual) individual who has two exclusive partners, both of which have dissimilar or opposing genders, most commonly one of each binary gender. The other two people may or may not be in a relationship with each other as well.

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.