Voidsexual is an ace-spec orientation where one's orientation feels hollow or it feels like a void where one's sexual orientation should be. It is similar to the difference between agender and gendervoid. Someone asexual people may feel as though they never had a sexual orientation in the first place, however a voidsexual person may feel like there is a place where a sexuality would or should be but isn't.
The romantic equivalent is voidromantic.
History
Voidsexual and voidromantic were coined on or before February 17, 2015 by Tumblr user Y0suke through MOGAI-Archive[1].
Flag
The voidsexual flag was created by wiki user RoseWatera on 19th November 2020. Black presents void and emptiness. Purple represents nothingness where something should be. Purple can also be interpreted as being ace-spec.