Disexual

Disexual (or dyosexual) is the attraction to exactly two genders. These can be any combination of two genders, and those genders can be binary or non-binary. It is similar to bisexuality, but disexuality is limited to exactly two genders, whereas bisexuals are attracted to two or more genders. It falls under multisexual.

History
Dyosexual was coined by mod Dawn on the Tumblr blog neolabels on December 22nd, 2018. It was recoined (possibly on accident) as disexual on the LGBTA wiki discord server by Choo Choo Mf/HakuoTan on June 28, 2020.

Flag
The dyosexual flag was coined by mod Dawn of the Tumblr blog neolabels on December 22, 2018. It has no confirmed meaning. Two disexual flags were created, seemingly by LGBTA wiki users, in July of 2020 and March of 2021.

Etymology
"Di" originates from the Greek word, "dis", which means "two". "Dyo" probably comes from "dýo", an alternate Greek word for "two".