Wiktionary
psycholagny
n. (context rare English) The ability to achieve orgasm without any physical stimulation of the genitalia, usually achieved through mental stimulation or fantasy alone.
Wikipedia
Psycholagny
Psycholagny is a sexual term that refers to the ability to reach or achieve orgasm without any physical stimulation of the genitalia, usually achieved through mental stimulation or fantasy alone. Also referred to as a "psychic orgasm".
Although the term is rarely encountered outside of word lists, it is a concept that is in use among many adult lifestyle communities.