autosexual

Being, or pertaining to, sex with oneself.

Masturbation is an autosexual (and fun) activity.

A person who has sex with themselves; one who is aroused by their own body.

By the sixth crowd — this time a speaker was advocating autosexuality and masturbation — the overcoat was back on, but reversed. It had been a light brown coat when he had met with Charlie, but he left the autosexuals wearing a light blue ...