Autosexual

Autosexuality some times called Narcissexual, is when one experiences sexual attraction exclusively towards themself; and can occur in many forms as follows: The romantic counterpart to autosexual is autoromantic.
 * 1) Having a hard time responding to someone's sexual touch, but being able to/comfortable with self pleasing like masturbation.
 * 2) Feeling no attraction to others but feeling attraction to yourself.
 * 3) Attraction to oneself.

History
Autosexual was first used as a very specific term used by Bernard Apfelbaum, a PHD graduate in clinical psychology in his work on the book "Principles and Practice of Sex Therapy.", although he considered it as a sexual abnormality but often autosexuals do not seek out sexual relationships as it is simply a way of life and how they feel about others, it is strictly the attraction to yourself and is not a psychological abnormality.

Etymology
The prefix comes from the Greek term 'auto', meaning 'self'.

Resources

 * 1) https://www.deviantart.com/savvyred/art/Autosexual-Pride-Flag-630696754