Adjective; a person who is self-sexual is someone sexually attracted to oneself. Can be considered a sexuality, such as
heterosexuality or
homosexuality. This may entail flirting with oneself in the mirror or being turned on by naked pictures of oneself.
This also stems to plots of
hentai or other porn, in which a person may clone oneself or encounter oneself from another dimension, and then engage in sexual intercourse with oneself. This is often considered homosexual or
incest sexual, or a form of masturbation.