Implasexual or inexsexual is the state of never being satisfied with your sexual orientation no matter how well it fits due to self-doubt. This causes one to compulsively search and seek out something that fits even better- to find "the orientation" or "the one truth"- though one will never be found due to a) Words will never be able to describe one's sexuality. b) One's orientation is paradoxical. This inability to find a "one true orientation" frequent causes self-doubt and can even cause the label implasexual to feel imperfect to the individual.
It is similar to xumsexual however it is not exclusive to neurodivergent people.