FACT: It is impossible for asexuals to be seduced by a succubus or incubus. Demisexuals can only be seduced if the *cubus takes the form of someone they have already been attracted to. Gray-asexuals can only be seduced on a full moon.
Someone needs to write a story about the badass asexual people who are the only ones who can hunt *cubi because they are immune. I’m imaging an Old West style setting, complete with lowered hat brims and narrowed eyes.