Ceterosexual

Ceterosexual, also known as skoliosexual or allotroposexual,  refers to sexual attraction to non-binary and/or potentially binary transgender people, sometimes exclusively. People who are ceterosexual may or may not be attracted to cisgender individuals, especially those who break gender roles, though this definition is disputed.

Etymology
The prefix skolio- means "crooked" or "bent".

The cetero– in ceterosexual is based on the Latin ceterus, meaning "the other, the rest". The sense of "other" in ceterosexual is meant to include people whose gender identity does not fit into the male/female binary.

The allotropo- in allotroposexual is based on the Greek words for "different" and "mode of life." 

History
The term "skoliosexual" was coined by DeviantArt user Nelde. Mentions of cetero as an alternative to skolio began to emerge in 2015, due to the origin of the prefix skolio-.

Flag
Several flags have been proposed. The first proposed flag was created by DeviantArt user SavvyRed on October 14, 2013. Yellow represents being non-binary or the attraction to non-binary people, green represents other genders such as bigender and genderqueer, and both white and black represents "neutral genderlessness", such as agender or a questioning gender identity. The lavender heart represents "love outside the gender norms".

However, due to an aversion, the most popular alternative removes the heart.

Bisexuality
Bisexuality is the sexual attraction to two or more genders, but it does not necessarily entail attraction to non-binary people. However, a bisexual person can be attracted to non-binary and to cisgender people. People can primarily identify as ceterosexual as well as bisexual, and vice versa.

Controversy
The term "skoliosexual" was derived from a word meaning bent or crooked. People who prefer "ceterosexual" believe the use of the prefix skolio- implies skoliosexuals, non-binary individuals, or both are wrong or "twisted".

Some trans people have said the term is or may become a fetishizing term that is interchangeable with "chaser", and that it is only positive when non-binary people use it themselves. A related belief is that only non-binary people should identify themselves with this term. Others dispute this and say that the term involves both sexual and romantic attraction, while a fetish is less likely to involve wholistic attraction to the person rather than only sexual.

Some people consider the term's inclusion of attraction to binary trans people as othering, as it defines trans men and women by them being trans, instead of as their gender.

Perceptions and discrimination
Because of the concern that cisgender people may identify with this label to fetishize trans individuals, the term is often considered restricted to non-binary people.