autoerotism
/ˌɔːtə(ʊ)ˈɛrətɪz(ə)m/originally Psychology and Psychoanalysis
noun
Behaviour related to psychosexual development in which an emotional or erotic desire is satisfied by oneself.
Origin
Late 19th century; earliest use found in Havelock Ellis (1859–1939), writer and sexologist. From auto- + erotism. Compare German Autoerotismus.