By "auto-erotism" I mean the phenomena of spontaneous sexual emotion generated in the absence of an external stimulus proceeding, directly or indirectly, from another person. [Ellis, "Auto-Erotism," in The Alienist and Neurologist, April 1898]
1820, noun use of neuter plural of Greek erotikos "amatory" (see erotic); originally a booksellers' catalogue heading.
And with a Blonde push
Over your impotence
[Emily Dickinson, #854, c. 1864]
1835, "to reach the highest point, culminate," from climax (n.). For erotic sense, see the noun. Related: Climaxed; climaxing.